{"id":"CVE-2026-100243","title":"Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS.\n\nThis issue affects Mediawiki - WikiSEO Extension: from * …","summary":"Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS.\n\nThis issue affects Mediawiki - WikiSEO Extension: from * …","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"vendor":"Wikimedia Foundation","product":"Mediawiki - WikiSEO Extension","affected":["mediawiki_-_wikiseo_extension < 1.46.1, 1.45.5, 1.43.10"],"published":"2026-09-29","updated":"2026-09-30","sourceUpdated":"2026-09-30T21:16:53.297","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100243","references":[{"url":"https://gerrit.wikimedia.org/r/q/Iff6ef320017649750e5c6723a91ee298eb97a408","label":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc"},{"url":"https://phabricator.wikimedia.org/T430896","label":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-30T20:44:39.532343Z"},"epss":0.00155,"epssPercentile":0.04532,"ingestedAt":"2026-09-29T17:41:02.201Z","slug":"CVE-2026-100243","body":"## Overview\n\nImproper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS.\n\nThis issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":213993,"id":"CVE-2026-100243","ts":1790803597351,"field":"cvss","old":null,"new":"6.1"},{"seq":213992,"id":"CVE-2026-100243","ts":1790803597351,"field":"severity","old":"none","new":"medium"}]}