{"id":"UBUNTU-CVE-2021-44858","details":"An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. It is possible to use action=edit&undo= followed by action=mcrundo and action=mcrrestore to view private pages on a private wiki that has at least one page set in $wgWhitelistRead.","modified":"2026-05-27T10:17:06.995574595Z","published":"2021-12-20T09:15:00Z","upstream":["CVE-2021-44858"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-44858"},{"type":"REPORT","url":"https://phabricator.wikimedia.org/T297322"},{"type":"REPORT","url":"https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/QEN3EK4JXAVJMJ5GF3GYOAKNJPEKFQYA/"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-44858"}],"affected":[{"package":{"name":"mediawiki","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mediawiki?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.27.3-1","1:1.27.4-1","1:1.27.4-2","1:1.27.4-3"],"ecosystem_specific":{"binaries":[{"binary_version":"1:1.27.4-3","binary_name":"mediawiki"},{"binary_name":"mediawiki-classes","binary_version":"1:1.27.4-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-44858.json"}},{"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_name":"mediawiki","binary_version":"1:1.31.7-1ubuntu0.1~esm1"},{"binary_version":"1:1.31.7-1ubuntu0.1~esm1","binary_name":"mediawiki-classes"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-44858.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}