{"id":"GHSA-7xv3-gf2g-498h","summary":"Semantic MediaWiki affected by Special:Ask table `sep` parameter reflected XSS","details":"#### Failure mode\n\n`sep` was inserted verbatim into the HTML that joins a table cell's values. This made it possible to inject HTML through the separator value. The same unsanitised table HTML is produced both for the standard `Special:Ask` render and for its raw request output (`request_type=raw`), so the injection was reachable without authentication.\n\n#### Remediation\n\n- In all non-wiki output modes (HTML, raw request, file), `sep` is escaped unless it is a safe `\u003cbr\u003e` variant.\n- This preserves legitimate line-break separators while blocking markup injection.\n\n#### Maintenance note\n\nIf the table renderer ever gains richer separator semantics, keep the whitelist explicit. Do not expand the allowed HTML surface casually.","aliases":["CVE-2026-77607"],"modified":"2026-09-18T17:00:06.241082616Z","published":"2026-09-18T16:50:01Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-09-18T16:50:01Z","nvd_published_at":null,"cwe_ids":["CWE-79"],"severity":"MODERATE"},"references":[{"type":"WEB","url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-7xv3-gf2g-498h"},{"type":"PACKAGE","url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki"},{"type":"WEB","url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.2.0"}],"affected":[{"package":{"name":"mediawiki/semantic-media-wiki","ecosystem":"Packagist","purl":"pkg:composer/mediawiki/semantic-media-wiki"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.2.0"}]}],"versions":["1.9","1.9-RC1","1.9.0.1","1.9.0.2","1.9.1","1.9.1.1","1.9.2","1.9beta1","2.0","2.0-RC1","2.0-RC2","2.0-RC3","2.1.0","2.1.0-RC1","2.1.1","2.1.2","2.1.3","2.2.0","2.2.0-RC1","2.2.1","2.2.2","2.2.3","2.3.0","2.3.0-RC1","2.3.1","2.4.0","2.4.0-RC1","2.4.1","2.4.2","2.4.3","2.4.4","2.4.5","2.4.6","2.5.0","2.5.0-rc.1","2.5.1","2.5.2","2.5.3","2.5.4","2.5.5","2.5.6","2.5.7","2.5.8","3.0.0","3.0.0-rc.1","3.0.0-rc.2","3.0.1","3.0.2","3.1.0","3.1.0-rc.1","3.1.1","3.1.2","3.1.3","3.1.4","3.1.5","3.1.6","3.2.0","3.2.0-rc.1","3.2.0-rc.2","3.2.1","3.2.2","3.2.3","4.0.0","4.0.1","4.0.2","4.1.0","4.1.1","4.1.2","4.1.3","4.2.0","5.0.0","5.0.1","5.0.2","5.1.0","6.0.0","6.0.1","7.0.0","7.1.0"],"database_specific":{"last_known_affected_version_range":"\u003c= 7.1.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-7xv3-gf2g-498h/GHSA-7xv3-gf2g-498h.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}