{"id":"CVE-2020-25814","aliases":["BIT-mediawiki-2020-25814","GHSA-4vr7-m8p8-434h"],"url":"https://o3.security/vulnerability/CVE-2020-25814","summary":"MediaWiki Cross-site Scripting (XSS) vulnerability","details":"In MediaWiki before 1.31.10 and 1.32.x through 1.34.x before 1.34.4, XSS related to jQuery can occur. The attacker creates a message with [javascript:payload xss] and turns it into a jQuery object with mw.message().parse(). The expected result is that the jQuery object does not contain an <a> tag (or it does not have a href attribute, or it's empty, etc.). The actual result is that the object contains an <a href =\"javascript... that executes when clicked.","published":"2020-09-27T21:15:12.687Z","modified":"2026-07-08T05:53:49.236306989Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"mediawiki/core","fixedVersion":"1.31.9"},{"ecosystem":"Packagist","name":"mediawiki/core","fixedVersion":"1.34.3"},{"ecosystem":"Packagist","name":"mediawiki/core","fixedVersion":"1.35.0"}],"fix":null,"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/"},{"type":"ADVISORY","url":"https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html"},{"type":"ADVISORY","url":"https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html"},{"type":"ADVISORY","url":"https://www.mediawiki.org/wiki/ResourceLoader/Core_modules#mediawiki.jqueryMsg"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:53:49.236306989Z"}}