{
    "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-2026-4267",
        "tracking": {
            "current_release_date": "2026-03-31T16:53:23.382642Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-4267",
            "initial_release_date": "2026-03-21T01:08:17.587905Z",
            "revision_history": [
                {
                    "date": "2026-03-21T01:08:17.587905Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)."
                },
                {
                    "date": "2026-03-21T01:08:22.304159Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-03-31T11:39:02.952948Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (4).| CWES updated (1)."
                },
                {
                    "date": "2026-03-31T11:39:05.225255Z",
                    "number": "4",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-31T12:26:49.732493Z",
                    "number": "5",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (4).| CWES updated (1)."
                },
                {
                    "date": "2026-03-31T12:26:53.762831Z",
                    "number": "6",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-31T14:39:51.136436Z",
                    "number": "7",
                    "summary": "Unknown change."
                },
                {
                    "date": "2026-03-31T16:53:19.271602Z",
                    "number": "8",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-31T16:53:21.623621Z",
                    "number": "9",
                    "summary": "NCSC Score updated."
                }
            ],
            "status": "interim",
            "version": "9"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:semver/<=3.20.3",
                                "product": {
                                    "name": "vers:semver/<=3.20.3",
                                    "product_id": "CSAFPID-5968273"
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "Query Monitor – The developer tools panel for WordPress"
                    }
                ],
                "category": "vendor",
                "name": "johnbillion"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-4267",
            "cwe": {
                "id": "CWE-80",
                "name": "Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)"
            },
            "notes": [
                {
                    "category": "description",
                    "text": "### Impact\n\nThe Query Monitor plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the `$_SERVER['REQUEST_URI']` parameter in all versions up to, and including, 3.20.3 due to insufficient output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick an Administrator-level user into performing an action such as clicking on a link.\n\nOn admin requests, the plugin reads user controlled data from `$_SERVER['REQUEST_URI']` and stores it in the request field, then renders `request`, `matched_query`, and `query_string` through `format_url()`. If the attacker supplied string does not contain `&`, `format_url()` returns it without HTML escaping, which allows injected HTML or JavaScript from the request target to be inserted directly into the page inside a `<code>` element and executed in the victim's browser.\n\n### Patches\n\nThis issue has been patched in Query Monitor 3.20.4.\n\n### Credits\n\nMany thanks to Dmitrii Ignatyev at CleanTalk for responsibly disclosing this vulnerability.\n\n### How can I report a security bug?\n\nYou can submit a private security vulnerability report to Query Monitor via [the Security tab on the GitHub repo](https://github.com/johnbillion/query-monitor/security). The GitHub Security Advisory process facilitates private collaboration on security issues. You'll receive credit for a valid report and a CVE if necessary.",
                    "title": "github - https://api.github.com/advisories/GHSA-2xr4-chcf-vmvf"
                },
                {
                    "category": "description",
                    "text": "The Query Monitor – The developer tools panel for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘$_SERVER['REQUEST_URI']’ parameter in all versions up to, and including, 3.20.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.",
                    "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/4xxx/CVE-2026-4267.json"
                },
                {
                    "category": "description",
                    "text": "The Query Monitor – The developer tools panel for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘$_SERVER['REQUEST_URI']’ parameter in all versions up to, and including, 3.20.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.",
                    "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-4267"
                },
                {
                    "category": "other",
                    "text": "0.00065",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "3.4",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "Is related to CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')), There is cwe data available from source Nvd, The value of the most recent EPSS score, The value of the most recent CVSS (V3) score",
                    "title": "NCSC Score top decreasing factors"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-5968273"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - github",
                    "url": "https://api.github.com/advisories/GHSA-2xr4-chcf-vmvf"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/4xxx/CVE-2026-4267.json"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-4267"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://github.com/johnbillion/query-monitor/security/advisories/GHSA-2xr4-chcf-vmvf"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://github.com/advisories/GHSA-2xr4-chcf-vmvf"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/0b75cad9-9f76-4839-8eb2-40d84662846d?source=cve"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://plugins.trac.wordpress.org/browser/query-monitor/tags/3.20.2/output/html/request.php#L60"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://plugins.trac.wordpress.org/browser/query-monitor/tags/3.20.2/output/html/request.php#L70"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://plugins.trac.wordpress.org/changeset/3486705/query-monitor"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
                        "baseScore": 7.2,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-5968273"
                    ]
                }
            ],
            "title": "CVE-2026-4267"
        }
    ]
}