{"id":"CVE-2021-39340","aliases":["EUVD-2021-25701","GHSA-f83v-8qph-hgj6"],"status":"published","title":"Notification – Custom Notifications and Alerts for WordPress \u003c= 7.2.4 Authenticated Stored Cross-Site Scripting","description":"The Notification WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/src/classes/Utils/Settings.php file which made it possible for attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 7.2.4. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.","severity":{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0093,"percentile":0.60912,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-11-01T21:01:17Z","modified":"2026-10-24T10:30:27Z","products":[{"vendor":"bracketspace","product":"notification"},{"vendor":"notification – custom notifications and alerts for wordpress","product":"notification – custom notifications and alerts for wordpress"}],"references":[{"url":"https://github.com/BigTiger2020/word-press/blob/main/Notification.md","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://wordfence.com/vulnerability-advisories/#CVE-2021-39340","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://plugins.trac.wordpress.org/browser/notification/tags/7.2.4/src/classes/Utils/Settings.php#L167","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39340"},{"url":"https://github.com/advisories/GHSA-f83v-8qph-hgj6"}],"sources":{"cve":[{"id":"CVE-2021-39340","title":"Notification – Custom Notifications and Alerts for WordPress \u003c= 7.2.4 Authenticated Stored Cross-Site Scripting","description":"The Notification WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/src/classes/Utils/Settings.php file which made it possible for attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 7.2.4. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.","status":"published","published":"2021-11-01T21:01:17.933Z","modified":"2025-03-31T17:45:55.631Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:09.540052Z"}],"euvd":[{"id":"EUVD-2021-25701","description":"The Notification WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/src/classes/Utils/Settings.php file which made it possible for attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 7.2.4. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.","status":"published","published":"2021-11-01T21:01:17Z","modified":"2025-03-31T17:45:55Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T20:52:46.759966Z"}],"ghsa":[{"id":"GHSA-f83v-8qph-hgj6","title":"The Notification WordPress plugin is vulnerable to Stored Cross-Site Scripting due to...","description":"The Notification WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/src/classes/Utils/Settings.php file which made it possible for attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 7.2.4. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.","status":"published","published":"2022-05-24T19:19:22Z","modified":"2023-01-30T05:03:31Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:51.429276Z"}],"nvd":[{"id":"CVE-2021-39340","description":"The Notification WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/src/classes/Utils/Settings.php file which made it possible for attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 7.2.4. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.","status":"published","published":"2021-11-01T21:15:07.807Z","modified":"2026-06-17T04:03:34.76Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":2.1,"vector":"AV:N/AC:H/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:00.549994Z"}],"osv":[{"id":"CVE-2021-39340","description":"The Notification WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/src/classes/Utils/Settings.php file which made it possible for attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 7.2.4. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.","status":"published","published":"2021-11-01T21:15:07.807Z","modified":"2026-10-24T10:30:27.318874062Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:20.843843Z"}]}}