{
    "document": {
        "category": "csaf_base",
        "csaf_version": "2.0",
        "distribution": {
            "tlp": {
                "label": "WHITE"
            }
        },
        "lang": "en",
        "notes": [
            {
                "category": "legal_disclaimer",
                "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
            }
        ],
        "publisher": {
            "category": "coordinator",
            "contact_details": "cert@ncsc.nl",
            "name": "National Cyber Security Centre",
            "namespace": "https://www.ncsc.nl/"
        },
        "title": "CVE-2026-30927",
        "tracking": {
            "current_release_date": "2026-03-23T01:35:44.686864Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-30927",
            "initial_release_date": "2026-03-09T21:11:56.356903Z",
            "revision_history": [
                {
                    "date": "2026-03-09T21:11:56.356903Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (4).| CWES updated (1)."
                },
                {
                    "date": "2026-03-09T21:12:02.310904Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-03-09T23:38:37.308033Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)."
                },
                {
                    "date": "2026-03-09T23:38:40.736498Z",
                    "number": "4",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-10T00:30:29.559372Z",
                    "number": "5",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (41).| Product Identifiers created (51).| Products created (11).| References created (3).| CWES updated (1)."
                },
                {
                    "date": "2026-03-10T07:35:01.433453Z",
                    "number": "6",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-10T14:20:58.779603Z",
                    "number": "7",
                    "summary": "Source created.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-10T14:21:03.682643Z",
                    "number": "8",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-10T14:39:13.163863Z",
                    "number": "9",
                    "summary": "Unknown change."
                },
                {
                    "date": "2026-03-10T18:30:51.117325Z",
                    "number": "10",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)."
                },
                {
                    "date": "2026-03-10T18:30:52.954237Z",
                    "number": "11",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-10T19:58:28.506794Z",
                    "number": "12",
                    "summary": "CVSS created.| References created (1)."
                },
                {
                    "date": "2026-03-11T00:33:03.608263Z",
                    "number": "13",
                    "summary": "CVSS created.| References created (1)."
                },
                {
                    "date": "2026-03-13T15:25:23.712166Z",
                    "number": "14",
                    "summary": "CVSS created.| Products created (1).| Product Identifiers created (1)."
                },
                {
                    "date": "2026-03-13T15:25:29.551121Z",
                    "number": "15",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-19T15:28:55.132518Z",
                    "number": "16",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (5).| CWES updated (1)."
                },
                {
                    "date": "2026-03-19T15:28:56.904291Z",
                    "number": "17",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-20T09:33:36.830492Z",
                    "number": "18",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-20T09:33:39.065993Z",
                    "number": "19",
                    "summary": "NCSC Score updated."
                }
            ],
            "status": "interim",
            "version": "19"
        }
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                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.3.9",
                                "product": {
                                    "name": "vers:unknown/v4.3.9",
                                    "product_id": "CSAFPID-4859597",
                                    "product_identification_helper": {
                                        "purl": "pkg:composer/admidio/admidio@v4.3.9"
                                    }
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v5.0-beta.1",
                                "product": {
                                    "name": "vers:unknown/v5.0-beta.1",
                                    "product_id": "CSAFPID-5772947",
                                    "product_identification_helper": {
                                        "purl": "pkg:composer/admidio/admidio@v5.0-Beta.1"
                                    }
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v5.0-beta.2",
                                "product": {
                                    "name": "vers:unknown/v5.0-beta.2",
                                    "product_id": "CSAFPID-5772948",
                                    "product_identification_helper": {
                                        "purl": "pkg:composer/admidio/admidio@v5.0-Beta.2"
                                    }
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v5.0-beta.3",
                                "product": {
                                    "name": "vers:unknown/v5.0-beta.3",
                                    "product_id": "CSAFPID-5772949",
                                    "product_identification_helper": {
                                        "purl": "pkg:composer/admidio/admidio@v5.0-Beta.3"
                                    }
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v5.0.0",
                                "product": {
                                    "name": "vers:unknown/v5.0.0",
                                    "product_id": "CSAFPID-5772950",
                                    "product_identification_helper": {
                                        "purl": "pkg:composer/admidio/admidio@v5.0.0"
                                    }
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v5.0.1",
                                "product": {
                                    "name": "vers:unknown/v5.0.1",
                                    "product_id": "CSAFPID-5772952",
                                    "product_identification_helper": {
                                        "purl": "pkg:composer/admidio/admidio@v5.0.1"
                                    }
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v5.0.2",
                                "product": {
                                    "name": "vers:unknown/v5.0.2",
                                    "product_id": "CSAFPID-5772953",
                                    "product_identification_helper": {
                                        "purl": "pkg:composer/admidio/admidio@v5.0.2"
                                    }
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v5.0.3",
                                "product": {
                                    "name": "vers:unknown/v5.0.3",
                                    "product_id": "CSAFPID-5772954",
                                    "product_identification_helper": {
                                        "purl": "pkg:composer/admidio/admidio@v5.0.3"
                                    }
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v5.0.4",
                                "product": {
                                    "name": "vers:unknown/v5.0.4",
                                    "product_id": "CSAFPID-5772955",
                                    "product_identification_helper": {
                                        "purl": "pkg:composer/admidio/admidio@v5.0.4"
                                    }
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v5.0.5",
                                "product": {
                                    "name": "vers:unknown/v5.0.5",
                                    "product_id": "CSAFPID-5772956",
                                    "product_identification_helper": {
                                        "purl": "pkg:composer/admidio/admidio@v5.0.5"
                                    }
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "admidio"
                    }
                ],
                "category": "vendor",
                "name": "Admidio"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-30927",
            "cwe": {
                "id": "CWE-639",
                "name": "Authorization Bypass Through User-Controlled Key"
            },
            "notes": [
                {
                    "category": "description",
                    "text": "## Vulnerability\n\nIn `modules/events/events_function.php`, the event participation logic allows any user who can participate in an event to register OTHER users by manipulating the `user_uuid` GET parameter.\n\nLine 47: `$getUserUuid = admFuncVariableIsValid($_GET, 'user_uuid', 'uuid', ...)`\nLine 424: `if ($event->possibleToParticipate() || $participants->isLeader($gCurrentUserId))`\n\nThe condition uses `||` (OR), meaning if `possibleToParticipate()` returns true (event is open for participation), ANY user - not just leaders - can specify a different `user_uuid` and register/cancel participation for that user.\n\nThe code then operates on `$user->getValue('usr_id')` (the target user from user_uuid) rather than the current user.\n\n## Impact\n- Register unwilling users for events (potential harassment/spam)\n- Cancel other users' event participation\n- Manipulate event participant counts and comments\n- If events have participation limits, fill slots with unwanted registrations\n\n## Fix\nFor non-leader users, force `user_uuid` to the current user:\n```php\nif (!$participants->isLeader($gCurrentUserId)) {\n    $getUserUuid = $gCurrentUser->getValue('usr_uuid');\n}\n```",
                    "title": "github - https://github.com/advisories/GHSA-7pfv-hr63-h7cw"
                },
                {
                    "category": "description",
                    "text": "Admidio is an open-source user management solution. Prior to 5.0.6, in modules/events/events_function.php, the event participation logic allows any user who can participate in an event to register OTHER users by manipulating the user_uuid GET parameter. The condition uses || (OR), meaning if possibleToParticipate() returns true (event is open for participation), ANY user - not just leaders - can specify a different user_uuid and register/cancel participation for that user. The code then operates on $user->getValue('usr_id') (the target user from user_uuid) rather than the current user. This vulnerability is fixed in 5.0.6.",
                    "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-30927"
                },
                {
                    "category": "description",
                    "text": "## Vulnerability\n\nIn `modules/events/events_function.php`, the event participation logic allows any user who can participate in an event to register OTHER users by manipulating the `user_uuid` GET parameter.\n\nLine 47: `$getUserUuid = admFuncVariableIsValid($_GET, 'user_uuid', 'uuid', ...)`\nLine 424: `if ($event->possibleToParticipate() || $participants->isLeader($gCurrentUserId))`\n\nThe condition uses `||` (OR), meaning if `possibleToParticipate()` returns true (event is open for participation), ANY user - not just leaders - can specify a different `user_uuid` and register/cancel participation for that user.\n\nThe code then operates on `$user->getValue('usr_id')` (the target user from user_uuid) rather than the current user.\n\n## Impact\n- Register unwilling users for events (potential harassment/spam)\n- Cancel other users' event participation\n- Manipulate event participant counts and comments\n- If events have participation limits, fill slots with unwanted registrations\n\n## Fix\nFor non-leader users, force `user_uuid` to the current user:\n```php\nif (!$participants->isLeader($gCurrentUserId)) {\n    $getUserUuid = $gCurrentUser->getValue('usr_uuid');\n}\n```",
                    "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Packagist%2FGHSA-7pfv-hr63-h7cw.json?alt=media"
                },
                {
                    "category": "description",
                    "text": "Admidio is an open-source user management solution. Prior to 5.0.6, in modules/events/events_function.php, the event participation logic allows any user who can participate in an event to register OTHER users by manipulating the user_uuid GET parameter. The condition uses || (OR), meaning if possibleToParticipate() returns true (event is open for participation), ANY user - not just leaders - can specify a different user_uuid and register/cancel participation for that user. The code then operates on $user->getValue('usr_id') (the target user from user_uuid) rather than the current user. This vulnerability is fixed in 5.0.6.",
                    "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-30927"
                },
                {
                    "category": "description",
                    "text": "## Vulnerability\n\nIn `modules/events/events_function.php`, the event participation logic allows any user who can participate in an event to register OTHER users by manipulating the `user_uuid` GET parameter.\n\nLine 47: `$getUserUuid = admFuncVariableIsValid($_GET, 'user_uuid', 'uuid', ...)`\nLine 424: `if ($event->possibleToParticipate() || $participants->isLeader($gCurrentUserId))`\n\nThe condition uses `||` (OR), meaning if `possibleToParticipate()` returns true (event is open for participation), ANY user - not just leaders - can specify a different `user_uuid` and register/cancel participation for that user.\n\nThe code then operates on `$user->getValue('usr_id')` (the target user from user_uuid) rather than the current user.\n\n## Impact\n- Register unwilling users for events (potential harassment/spam)\n- Cancel other users' event participation\n- Manipulate event participant counts and comments\n- If events have participation limits, fill slots with unwanted registrations\n\n## Fix\nFor non-leader users, force `user_uuid` to the current user:\n```php\nif (!$participants->isLeader($gCurrentUserId)) {\n    $getUserUuid = $gCurrentUser->getValue('usr_uuid');\n}\n```",
                    "title": "github - https://api.github.com/advisories/GHSA-7pfv-hr63-h7cw"
                },
                {
                    "category": "other",
                    "text": "0.00014",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
                    "title": "CVSSV4"
                },
                {
                    "category": "other",
                    "text": "5.3",
                    "title": "CVSSV4 base score"
                },
                {
                    "category": "other",
                    "text": "4.0",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "There is product data available from source Nvd",
                    "title": "NCSC Score top increasing factors"
                },
                {
                    "category": "other",
                    "text": "The value of the most recent CVSS (V3) score, Is related to (a version of) an uncommon product",
                    "title": "NCSC Score top decreasing factors"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-5772716",
                    "CSAFPID-4858442",
                    "CSAFPID-4858443",
                    "CSAFPID-4858444",
                    "CSAFPID-4858445",
                    "CSAFPID-4858446",
                    "CSAFPID-4858447",
                    "CSAFPID-4858448",
                    "CSAFPID-4858449",
                    "CSAFPID-4858450",
                    "CSAFPID-4858451",
                    "CSAFPID-4858452",
                    "CSAFPID-4858453",
                    "CSAFPID-4858454",
                    "CSAFPID-4858455",
                    "CSAFPID-4858456",
                    "CSAFPID-4858457",
                    "CSAFPID-4858458",
                    "CSAFPID-4858459",
                    "CSAFPID-4858460",
                    "CSAFPID-4858461",
                    "CSAFPID-4858462",
                    "CSAFPID-4858463",
                    "CSAFPID-4858464",
                    "CSAFPID-4858465",
                    "CSAFPID-4858466",
                    "CSAFPID-4858467",
                    "CSAFPID-4858468",
                    "CSAFPID-4858469",
                    "CSAFPID-4858470",
                    "CSAFPID-4858471",
                    "CSAFPID-4858472",
                    "CSAFPID-4858473",
                    "CSAFPID-4858474",
                    "CSAFPID-4859595",
                    "CSAFPID-4859596",
                    "CSAFPID-4859597",
                    "CSAFPID-5132728",
                    "CSAFPID-5132729",
                    "CSAFPID-5132730",
                    "CSAFPID-5132731",
                    "CSAFPID-5132732",
                    "CSAFPID-5772943",
                    "CSAFPID-5772947",
                    "CSAFPID-5772948",
                    "CSAFPID-5772949",
                    "CSAFPID-5772950",
                    "CSAFPID-5772952",
                    "CSAFPID-5772953",
                    "CSAFPID-5772954",
                    "CSAFPID-5772955",
                    "CSAFPID-5772956",
                    "CSAFPID-5772958",
                    "CSAFPID-5814669"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - github",
                    "url": "https://github.com/advisories/GHSA-7pfv-hr63-h7cw"
                },
                {
                    "category": "external",
                    "summary": "Source raw - github",
                    "url": "https://api.github.com/advisories/GHSA-7pfv-hr63-h7cw"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-30927"
                },
                {
                    "category": "external",
                    "summary": "Source raw - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/30xxx/CVE-2026-30927.json"
                },
                {
                    "category": "external",
                    "summary": "Source - osv",
                    "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Packagist%2FGHSA-7pfv-hr63-h7cw.json?alt=media"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-30927"
                },
                {
                    "category": "external",
                    "summary": "Source raw - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30927"
                },
                {
                    "category": "external",
                    "summary": "Source raw - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-30927"
                },
                {
                    "category": "external",
                    "summary": "Source - github",
                    "url": "https://api.github.com/advisories/GHSA-7pfv-hr63-h7cw"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; github; nvd; osv",
                    "url": "https://github.com/Admidio/admidio/security/advisories/GHSA-7pfv-hr63-h7cw"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; github; nvd; osv",
                    "url": "https://github.com/Admidio/admidio/issues/1985"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; github; nvd; osv",
                    "url": "https://github.com/Admidio/admidio/commit/e47f70cc3cbcdb39635fdbaaef02d19f604b8c3e"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://github.com/advisories/GHSA-7pfv-hr63-h7cw"
                },
                {
                    "category": "external",
                    "summary": "Reference - github; osv",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30927"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
                        "baseScore": 5.4,
                        "baseSeverity": "MEDIUM"
                    },
                    "products": [
                        "CSAFPID-4858442",
                        "CSAFPID-4858443",
                        "CSAFPID-4858444",
                        "CSAFPID-4858445",
                        "CSAFPID-4858446",
                        "CSAFPID-4858447",
                        "CSAFPID-4858448",
                        "CSAFPID-4858449",
                        "CSAFPID-4858450",
                        "CSAFPID-4858451",
                        "CSAFPID-4858452",
                        "CSAFPID-4858453",
                        "CSAFPID-4858454",
                        "CSAFPID-4858455",
                        "CSAFPID-4858456",
                        "CSAFPID-4858457",
                        "CSAFPID-4858458",
                        "CSAFPID-4858459",
                        "CSAFPID-4858460",
                        "CSAFPID-4858461",
                        "CSAFPID-4858462",
                        "CSAFPID-4858463",
                        "CSAFPID-4858464",
                        "CSAFPID-4858465",
                        "CSAFPID-4858466",
                        "CSAFPID-4858467",
                        "CSAFPID-4858468",
                        "CSAFPID-4858469",
                        "CSAFPID-4858470",
                        "CSAFPID-4858471",
                        "CSAFPID-4858472",
                        "CSAFPID-4858473",
                        "CSAFPID-4858474",
                        "CSAFPID-4859595",
                        "CSAFPID-4859596",
                        "CSAFPID-4859597",
                        "CSAFPID-5132728",
                        "CSAFPID-5132729",
                        "CSAFPID-5132730",
                        "CSAFPID-5132731",
                        "CSAFPID-5132732",
                        "CSAFPID-5772716",
                        "CSAFPID-5772943",
                        "CSAFPID-5772947",
                        "CSAFPID-5772948",
                        "CSAFPID-5772949",
                        "CSAFPID-5772950",
                        "CSAFPID-5772952",
                        "CSAFPID-5772953",
                        "CSAFPID-5772954",
                        "CSAFPID-5772955",
                        "CSAFPID-5772956",
                        "CSAFPID-5772958",
                        "CSAFPID-5814669"
                    ]
                }
            ],
            "title": "CVE-2026-30927"
        }
    ]
}