{"id":"CVE-2024-23176","title":"An issue was discovered in the MassMessage extension in MediaWiki before 1.40.2","summary":"An issue was discovered in the MassMessage extension in MediaWiki before 1.40.2. For a Special:MassMessage?uselang=x-xss URL, the i18n key massmessage-form-page-help allows XSS.","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"vendor":"Red Hat","product":"MassMessage","affected":["MassMessage < 1.40.2"],"published":"2026-09-14","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:31:54.210","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-23176","references":[{"url":"https://lists.wikimedia.org/hyperkitty/list/mediawiki-announce@lists.wikimedia.org/message/TDBUBCCOQJUT4SCHJNPHKQNPBUUETY52/","label":"cve@mitre.org"},{"url":"https://phabricator.wikimedia.org/T347742","label":"cve@mitre.org"},{"url":"https://phabricator.wikimedia.org/T347742","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-23176.json"},{"url":"https://access.redhat.com/security/cve/CVE-2024-23176"},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-23176"}],"tags":["nvd","csaf","vex","red-hat","cve.org","exploit-available"],"epss":0.00171,"epssPercentile":0.06811,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-14T15:23:37.190582Z"},"ingestedAt":"2026-09-14T15:23:07.464Z","slug":"CVE-2024-23176","body":"## Overview\n\nAn issue was discovered in the MassMessage extension in MediaWiki before 1.40.2. For a Special:MassMessage?uselang=x-xss URL, the i18n key massmessage-form-page-help allows XSS.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-23176.json)","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":203095,"id":"CVE-2024-23176","ts":1789409574729,"field":"exploit_available","old":"false","new":"true"}]}