{"id":"UBUNTU-CVE-2021-30154","details":"An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. On Special:NewFiles, all the mediastatistics-header-* messages are output in HTML unescaped, leading to XSS.","modified":"2026-05-27T10:15:18.960401837Z","published":"2021-04-06T07:15:00Z","upstream":["CVE-2021-30154"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-30154"},{"type":"REPORT","url":"https://phabricator.wikimedia.org/T278014"},{"type":"REPORT","url":"https://gerrit.wikimedia.org/r/c/mediawiki/core/+/674083/"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-30154"}],"affected":[{"package":{"name":"mediawiki","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.31.2-1ubuntu1","1:1.31.5-1","1:1.31.5-1ubuntu1","1:1.31.5-2","1:1.31.5-3","1:1.31.5-3ubuntu1","1:1.31.6-1","1:1.31.7-1","1:1.31.7-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:1.31.7-1ubuntu0.1~esm1","binary_name":"mediawiki"},{"binary_name":"mediawiki-classes","binary_version":"1:1.31.7-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-30154.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"},{"type":"Ubuntu","score":"medium"}]}