{"id":"CVE-2021-30153","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-30153","generatedAt":"2026-10-27T22:31:43.260Z","title":"When using VisualEditor to edit a MediaWiki user page belonging to an existing, but hidden, user, VisualEditor will disclose that the user exists.","description":"An issue was discovered in the VisualEditor extension in MediaWiki before 1.31.13, and 1.32.x through 1.35.x before 1.35.2. . When using VisualEditor to edit a MediaWiki user page belonging to an existing, but hidden, user, VisualEditor will disclose that the user exists. (It shouldn't because they are hidden.) This is related to ApiVisualEditor.","published":"2023-04-15T20:16:01.000Z","lastModified":"2026-06-17T03:49:45.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-668"],"affected":["mediawiki/mediawiki"],"epss":{"score":0.00835,"percentile":0.57446,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.83%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://lists.wikimedia.org/hyperkitty/list/wikitech-l%40lists.wikimedia.org/message/XYBF5RSTJRMVCP7QBYK7643W75A3KCIY/","source":"cve@mitre.org"},{"url":"https://lists.wikimedia.org/pipermail/wikitech-l/2021-April/094418.html","tags":["Mailing List","Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://phabricator.wikimedia.org/T270453","tags":["Exploit","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://lists.wikimedia.org/hyperkitty/list/wikitech-l%40lists.wikimedia.org/message/XYBF5RSTJRMVCP7QBYK7643W75A3KCIY/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.wikimedia.org/pipermail/wikitech-l/2021-April/094418.html","tags":["Mailing List","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://phabricator.wikimedia.org/T270453","tags":["Exploit","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-30153","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}