{"id":"CVE-2020-35479","details":"MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. Language::translateBlockExpiry itself does not escape in all code paths. For example, the return of Language::userTimeAndDate is is always unsafe for HTML in a month value. This affects MediaWiki 1.12.0 and later.","aliases":["BIT-mediawiki-2020-35479"],"modified":"2026-04-16T04:41:48.178757045Z","published":"2020-12-18T08:15:15.357Z","references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html"},{"type":"ADVISORY","url":"https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html"},{"type":"ADVISORY","url":"https://www.debian.org/security/2020/dsa-4816"},{"type":"EVIDENCE","url":"https://phabricator.wikimedia.org/T268938"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wikimedia/mediawiki","events":[{"introduced":"33c8b6247e6ca4e68e1982d3950986b632fc4f0d"},{"fixed":"3e26b5ff1468f98cf306575d125b29a6645bf2ea"}],"database_specific":{"versions":[{"introduced":"1.12.0"},{"fixed":"1.35.1"}]}}],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]},{"events":[{"introduced":"0"},{"last_affected":"33"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-35479.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}