{"id":"CVE-2019-12472","aliases":["GHSA-7mqg-5fgh-xh4r"],"url":"https://o3.security/vulnerability/CVE-2019-12472","summary":"MediaWiki Incorrect Access Control vulnerability","details":"An Incorrect Access Control vulnerability was found in Wikimedia MediaWiki 1.18.0 through 1.32.1. It is possible to bypass the limits on IP range blocks ($wgBlockCIDRLimit) by using the API. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.","published":"2019-07-10T16:15:11.227Z","modified":"2026-07-08T12:53:06.467820Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":{"score":0.01342,"percentile":0.68749,"asOf":"2026-08-23"},"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":"REPORT","url":"https://phabricator.wikimedia.org/T199540"},{"type":"FIX","url":"https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-12472"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2019-12472.yaml"},{"type":"PACKAGE","url":"https://github.com/wikimedia/mediawiki"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T12:53:06.467820Z"}}