{"id":"CVE-2026-126564","summary":"Semantic MediaWiki 2.5.0 before 7.4.1 Stored XSS via Special:Browse Factbox Title","details":"Semantic MediaWiki 2.5.0 before 7.4.1 contains a stored cross-site scripting vulnerability in ValueFormatter::getFormattedSubject() that renders property label segments after a literal   as unescaped markup. Users with page-edit rights can set a preferred property label containing an img onerror payload that executes when anyone, including administrators, views Special:Browse or the smwbrowse API.","aliases":["GHSA-mc5x-2j7v-x8hp"],"modified":"2026-11-12T02:48:34.806035003Z","published":"2026-11-11T02:35:59.923Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126564.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-79"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126564.json"},{"type":"ADVISORY","url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.4.1"},{"type":"ADVISORY","url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-mc5x-2j7v-x8hp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126564"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/semantic-mediawiki-2.5.0-before-7.4.1-stored-xss-via-special-browse-factbox-title"},{"type":"FIX","url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/c9bf9f25549bb2f5eab916339b267a1732002c4c"},{"type":"PACKAGE","url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki"},{"type":"ARTICLE","url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/7.4.0/src/MediaWiki/Specials/Browse/ValueFormatter.php#L34-L55"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/semanticmediawiki/semanticmediawiki","events":[{"introduced":"dbbf3d1e465f95c912da2ef421db729ad90f993e"},{"fixed":"bcc3cbf4884f0474232a68d3eff060f93a506379"},{"fixed":"c9bf9f25549bb2f5eab916339b267a1732002c4c"}],"database_specific":{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"2.5.0"},{"fixed":"7.4.1"}],"source":"AFFECTED_FIELD"},{"range":[{"fixed":"c9bf9f25549bb2f5eab916339b267a1732002c4c"}],"source":"REFERENCES_COMMIT"},{"source":"REFERENCES_TAG","original_tag":"7.4.1","range":[{"fixed":"bcc3cbf4884f0474232a68d3eff060f93a506379"}]}]}}],"versions":["7.4.0","7.3.1","7.3.0","7.2.1","7.2.0","7.1.0","7.0.0","6.0.1","6.0.0","5.1.0","5.0.2","5.0.1","5.0.0","4.2.0","4.1.3","4.1.2","4.1.1","4.1.0","4.0.2","4.0.1","4.0.0","3.2.0","3.2.0-rc.1","3.2.0-rc.2","3.1.0","3.1.0-rc.1","3.0.0","3.0.0-rc.2","3.0.0-rc.1","2.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126564.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"}]}