{"id":"CVE-2020-35480","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-35480","generatedAt":"2026-10-28T06:34:24.189Z","title":"Missing users (accounts that don't exist) and hidden users (accounts that have been explicitly hidden due to being abusive, or similar) that the viewer cannot see are handled differently, exposing sensitive information about the hidden status to…","description":"An issue was discovered in MediaWiki before 1.35.1. Missing users (accounts that don't exist) and hidden users (accounts that have been explicitly hidden due to being abusive, or similar) that the viewer cannot see are handled differently, exposing sensitive information about the hidden status to unprivileged viewers. This exists on various code paths.","published":"2020-12-18T08:15:15.000Z","lastModified":"2026-06-17T03:13:47.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-203"],"affected":["mediawiki/mediawiki","debian/debian linux","fedoraproject/fedora"],"epss":{"score":0.01493,"percentile":0.7401,"date":"2026-10-27","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 (1.49%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/","source":"cve@mitre.org"},{"url":"https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html","tags":["Mailing List","Release Notes","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://phabricator.wikimedia.org/T120883","tags":["Permissions Required"],"source":"cve@mitre.org"},{"url":"https://www.debian.org/security/2020/dsa-4816","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html","tags":["Mailing List","Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://phabricator.wikimedia.org/T120883","tags":["Permissions Required"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2020/dsa-4816","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-35480","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."}