{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-103439", "assignerOrgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "state": "PUBLISHED", "assignerShortName": "wikimedia-foundation", "dateReserved": "2026-09-30T15:41:01.269Z", "datePublished": "2026-09-30T17:34:10.328Z", "dateUpdated": "2026-09-30T17:34:10.328Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "shortName": "wikimedia-foundation", "dateUpdated": "2026-09-30T17:34:10.328Z"}, "title": "Various rawParams() and escaped() updates to prevent XSS in Wikibase extension", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-80", "description": "CWE-80 Improper neutralization of Script-Related HTML tags in a web page (basic XSS)", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-63", "descriptions": [{"lang": "en", "value": "CAPEC-63 Cross-Site Scripting (XSS)"}]}], "affected": [{"vendor": "The Wikimedia Foundation", "product": "MediaWiki Wikbase extension", "repo": "https://gerrit.wikimedia.org/r/mediawiki/extensions/Wikibase", "versions": [{"status": "affected", "version": "1.46"}, {"status": "affected", "version": "1.45"}, {"status": "affected", "version": "1.43"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Wikbase extension allows Cross-Site Scripting (XSS).\n\nThis issue affects MediaWiki Wikbase extension: 1.46, 1.45, and 1.43.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Wikbase extension allows Cross-Site Scripting (XSS).<p>This issue affects MediaWiki Wikbase extension: 1.46, 1.45, and 1.43.</p>"}]}], "references": [{"url": "https://phabricator.wikimedia.org/T182213"}, {"url": "https://gerrit.wikimedia.org/r/q/Ie7a35b211565148e0cae437a4a8c41633b81f1b3"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "subConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subAvailabilityImpact": "LOW", "exploitMaturity": "PROOF_OF_CONCEPT", "Safety": "NEGLIGIBLE", "Automatable": "YES", "Recovery": "USER", "valueDensity": "DIFFUSE", "vulnerabilityResponseEffort": "MODERATE", "providerUrgency": "AMBER", "version": "4.0", "baseSeverity": "LOW", "baseScore": 0.3, "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber"}}], "source": {"discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

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