{"id":"CVE-2021-39340","details":"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.","modified":"2026-04-10T04:37:59.607734Z","published":"2021-11-01T21:15:07.807Z","references":[{"type":"ADVISORY","url":"https://wordfence.com/vulnerability-advisories/#CVE-2021-39340"},{"type":"FIX","url":"https://plugins.trac.wordpress.org/browser/notification/tags/7.2.4/src/classes/Utils/Settings.php#L167"},{"type":"EVIDENCE","url":"https://github.com/BigTiger2020/word-press/blob/main/Notification.md"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bracketspace/notification","events":[{"introduced":"0"},{"last_affected":"a24094c19ca118a628e30803d1d1a545e50c1bd3"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"7.2.4"}]}}],"versions":["1.1.2","1.2","1.3","1.3.1","1.4","2.0","7.2.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-39340.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N"}]}