{ "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-2026-4020", "tracking": { "current_release_date": "2026-04-02T15:52:00.419008Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-4020", "initial_release_date": "2026-03-31T01:38:40.086844Z", "revision_history": [ { "date": "2026-03-31T01:38:40.086844Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (7).| CWES updated (1)." }, { "date": "2026-03-31T01:38:49.465517Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-31T02:25:09.488677Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (7).| CWES updated (1)." }, { "date": "2026-03-31T02:25:11.834497Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-31T07:35:27.093787Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-03-31T16:39:19.250680Z", "number": "6", "summary": "Unknown change." }, { "date": "2026-03-31T16:53:53.331731Z", "number": "7", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-04-01T06:00:53.242463Z", "number": "8", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| Exploits created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-04-01T06:00:56.301959Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-04-01T06:01:05.132564Z", "number": "10", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| Exploits created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-04-01T19:06:10.490815Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-04-02T14:57:22.182893Z", "number": "12", "summary": "EPSS updated." }, { "date": "2026-04-02T14:57:26.207344Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-04-02T15:41:13.109281Z", "number": "14", "summary": "Unknown change." } ], "status": "interim", "version": "14" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:semver/<=2.1.4", "product": { "name": "vers:semver/<=2.1.4", "product_id": "CSAFPID-5966270" } } ], "category": "product_name", "name": "Gravity SMTP" } ], "category": "vendor", "name": "RocketGenius" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-5970653" } } ], "category": "product_name", "name": "gravitysmtp" } ], "category": "vendor", "name": "rocketgenius" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-4020", "notes": [ { "category": "description", "text": "The Gravity SMTP plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.1.4. This is due to a REST API endpoint registered at /wp-json/gravitysmtp/v1/tests/mock-data with a permission_callback that unconditionally returns true, allowing any unauthenticated visitor to access it. When the ?page=gravitysmtp-settings query parameter is appended, the plugin's register_connector_data() method populates internal connector data, causing the endpoint to return approximately 365 KB of JSON containing the full System Report. This makes it possible for unauthenticated attackers to retrieve detailed system configuration data including PHP version, loaded extensions, web server version, document root path, database server type and version, WordPress version, all active plugins with versions, active theme, WordPress configuration details, database table names, and any API keys/tokens configured in the plugin.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/4xxx/CVE-2026-4020.json" }, { "category": "description", "text": "The Gravity SMTP plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.1.4. This is due to a REST API endpoint registered at /wp-json/gravitysmtp/v1/tests/mock-data with a permission_callback that unconditionally returns true, allowing any unauthenticated visitor to access it. When the ?page=gravitysmtp-settings query parameter is appended, the plugin's register_connector_data() method populates internal connector data, causing the endpoint to return approximately 365 KB of JSON containing the full System Report. This makes it possible for unauthenticated attackers to retrieve detailed system configuration data including PHP version, loaded extensions, web server version, document root path, database server type and version, WordPress version, all active plugins with versions, active theme, WordPress configuration details, database table names, and any API keys/tokens configured in the plugin.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-4020" }, { "category": "description", "text": "Gravity SMTP WordPress plugin <= 2.1.4 contains a sensitive information exposure caused by an unrestricted REST API endpoint at /wp-json/gravitysmtp/v1/tests/mock-data, letting unauthenticated attackers retrieve detailed system configuration data, exploit requires no authentication.\n", "title": "nucleitemplates - https://github.com/projectdiscovery/nuclei-templates/raw/9bdf4cdb0725483158321013ac8aee2df60fcf7f/http%2Fcves%2F2026%2FCVE-2026-4020.yaml" }, { "category": "description", "text": "Gravity SMTP WordPress plugin <= 2.1.4 contains a sensitive information exposure caused by an unrestricted REST API endpoint at /wp-json/gravitysmtp/v1/tests/mock-data, letting unauthenticated attackers retrieve detailed system configuration data, exploit requires no authentication.\n", "title": "nucleitemplates - https://github.com/projectdiscovery/nuclei-templates/raw/556991a08bd6e7ed70777bc31283ca25a6fa1205/http%2Fcves%2F2026%2FCVE-2026-4020.yaml" }, { "category": "other", "text": "0.04486", "title": "EPSS" }, { "category": "other", "text": "4.2", "title": "NCSC Score" }, { "category": "other", "text": "There is cwe data available from source Nvd, Exploit code publicly available", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5966270", "CSAFPID-5970653" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/4xxx/CVE-2026-4020.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-4020" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - nucleitemplates", "url": "https://github.com/projectdiscovery/nuclei-templates/raw/9bdf4cdb0725483158321013ac8aee2df60fcf7f/http%2Fcves%2F2026%2FCVE-2026-4020.yaml" }, { "category": "external", "summary": "Source - nucleitemplates", "url": "https://github.com/projectdiscovery/nuclei-templates/raw/556991a08bd6e7ed70777bc31283ca25a6fa1205/http%2Fcves%2F2026%2FCVE-2026-4020.yaml" }, { "category": "external", "summary": "Reference - cveprojectv5; nucleitemplates; nvd", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/12a296db-ecc0-409b-8718-0c208504053a?source=cve" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://www.gravityforms.com/gravity-smtp/" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://plugins.trac.wordpress.org/browser/gravitysmtp/trunk/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L86" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://plugins.trac.wordpress.org/browser/gravitysmtp/tags/2.1.4/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L86" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://plugins.trac.wordpress.org/browser/gravitysmtp/trunk/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L103" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://plugins.trac.wordpress.org/browser/gravitysmtp/tags/2.1.4/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L103" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://docs.gravitysmtp.com/gravity-smtp-changelog/" }, { "category": "external", "summary": "Reference - nucleitemplates", "url": "https://patchstack.com/database/vulnerability/wordpress-gravity-smtp-plugin-2-1-4-unauthenticated-sensitive-information-exposure-via-rest-api-vulnerability" }, { "category": "external", "summary": "Reference - nucleitemplates", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4020" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-5966270", "CSAFPID-5970653" ] } ], "title": "CVE-2026-4020" } ] }