{"id":"CVE-2019-12473","aliases":["GHSA-33xw-x3pr-rvqj"],"url":"https://o3.security/vulnerability/CVE-2019-12473","summary":"Wikimedia Potential DOS due to slow WatchedItemStore::countVisitingWatchersMultiple","details":"Wikimedia MediaWiki 1.27.0 through 1.32.1 might allow DoS. Passing invalid titles to the API could cause a DoS by querying the entire watchlist table. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.","published":"2019-07-10T16:15:11.290Z","modified":"2026-10-24T10:30:57.910451978Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"mediawiki/core","fixedVersion":"1.27.6"},{"ecosystem":"Packagist","name":"mediawiki/core","fixedVersion":"1.30.2"},{"ecosystem":"Packagist","name":"mediawiki/core","fixedVersion":"1.31.2"},{"ecosystem":"Packagist","name":"mediawiki/core","fixedVersion":"1.32.2"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://phabricator.wikimedia.org/T204729"},{"type":"ADVISORY","url":"https://seclists.org/bugtraq/2019/Jun/12"},{"type":"ADVISORY","url":"https://www.debian.org/security/2019/dsa-4460"},{"type":"FIX","url":"https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-12473"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2019-12473.yaml"},{"type":"PACKAGE","url":"https://github.com/wikimedia/mediawiki"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T10:30:57.910451978Z"}}