{"api_version":"1","generated_at":"2026-07-23T10:54:56+00:00","cve":"CVE-2020-35480","urls":{"html":"https://cve.report/CVE-2020-35480","api":"https://cve.report/api/cve/CVE-2020-35480.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-35480","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-35480"},"summary":{"title":"CVE-2020-35480","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.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2020-12-18 08:15:00","updated_at":"2023-11-07 03:21:00"},"problem_types":["CWE-203"],"metrics":[],"references":[{"url":"https://www.debian.org/security/2020/dsa-4816","name":"DSA-4816","refsource":"DEBIAN","tags":["Mailing List","Third Party Advisory"],"title":"Debian -- Security Information -- DSA-4816-1 mediawiki","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html","name":"https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html","refsource":"MISC","tags":["Mailing List","Release Notes","Vendor Advisory"],"title":"[MediaWiki-announce] Security and maintenance release: 1.31.11 / 1.35.1","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/","name":"FEDORA-2020-0be2d40e13","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 33 Update: mediawiki-1.35.1-1.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://phabricator.wikimedia.org/T120883","name":"https://phabricator.wikimedia.org/T120883","refsource":"MISC","tags":["Permissions Required"],"title":"Login","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/","name":"FEDORA-2020-0be2d40e13","refsource":"","tags":[],"title":"[SECURITY] Fedora 33 Update: mediawiki-1.35.1-1.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html","name":"[debian-lts-announce] 20201223 [SECURITY] [DLA 2504-1] mediawiki security update","refsource":"MLIST","tags":["Mailing List","Third Party Advisory"],"title":"[SECURITY] [DLA 2504-1] mediawiki security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-35480","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-35480","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"35480","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"10.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"35480","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"9.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"35480","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"10.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"35480","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"9.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"35480","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"33","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"35480","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mediawiki","cpe5":"mediawiki","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"35480","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mediawiki","cpe5":"mediawiki","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2020-35480","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"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."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://phabricator.wikimedia.org/T120883","refsource":"MISC","name":"https://phabricator.wikimedia.org/T120883"},{"refsource":"MISC","name":"https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html","url":"https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html"},{"refsource":"DEBIAN","name":"DSA-4816","url":"https://www.debian.org/security/2020/dsa-4816"},{"refsource":"MLIST","name":"[debian-lts-announce] 20201223 [SECURITY] [DLA 2504-1] mediawiki security update","url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html"},{"refsource":"FEDORA","name":"FEDORA-2020-0be2d40e13","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/"}]}},"nvd":{"publishedDate":"2020-12-18 08:15:00","lastModifiedDate":"2023-11-07 03:21:00","problem_types":["CWE-203"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM"},"exploitabilityScore":3.9,"impactScore":1.4},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:N/A:N","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*","versionEndExcluding":"1.35.1","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"35480","Ordinal":"193980","Title":"CVE-2020-35480","CVE":"CVE-2020-35480","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"35480","Ordinal":"1","NoteData":"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.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"35480","Ordinal":"2","NoteData":"2020-12-18","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"35480","Ordinal":"3","NoteData":"2020-12-26","Type":"Other","Title":"Modified"}]}}}