{"affected":[{"defaultStatus":"unaffected","ecosystem":"composer","packageName":"mediawiki/semantic-media-wiki","product":"SemanticMediaWiki","source":"CNA: VulnCheck","vendor":"SemanticMediaWiki","versions":[{"lessThan":"7.4.1","status":"affected","version":"2.5.0","versionType":"semver"},{"status":"unaffected","version":"7.4.1","versionType":"semver"}]}],"cveId":"CVE-2026-126564","cwes":["CWE-79"],"description":"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.","epss":{"date":"2026-11-12","percentile":0.13101,"score":0.00223},"exploits":[],"kev":null,"metrics":[{"score":5.1,"severity":"medium","source":"CNA: VulnCheck","vector":"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","version":"4.0"},{"score":5.4,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},{"score":5.1,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":5.4,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}],"modifiedAt":1794506333490,"publishedAt":1794364559923,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-mc5x-2j7v-x8hp"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/c9bf9f25549bb2f5eab916339b267a1732002c4c"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.4.1"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/7.4.0/src/MediaWiki/Specials/Browse/ValueFormatter.php#L34-L55"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/semantic-mediawiki-2.5.0-before-7.4.1-stored-xss-via-special-browse-factbox-title"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/7.4.0/src/MediaWiki/Specials/Browse/ValueFormatter.php#L34-L55"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/c9bf9f25549bb2f5eab916339b267a1732002c4c"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.4.1"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-mc5x-2j7v-x8hp"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/semantic-mediawiki-2.5.0-before-7.4.1-stored-xss-via-special-browse-factbox-title"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/c9bf9f25549bb2f5eab916339b267a1732002c4c"}],"revision":"8fe3d491869cd72863f2e9974676c2e025566bef6055137a40d1f8121c38588f","sources":[{"modifiedAt":1794506333490,"name":"CNA: VulnCheck","retrievedAt":1794507014802,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126564"},{"modifiedAt":1794367010723,"name":"NVD","retrievedAt":1794377963019,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126564"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794507043550,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-126564"}],"ssvc":{"assessedAt":1794500824953,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Semantic MediaWiki 2.5.0 before 7.4.1 Stored XSS via Special:Browse Factbox Title","updatedAt":1794507043550}