{"id":"GHSA-jfj7-249r-7j2m","summary":"TabberNeue vulnerable to Stored XSS through wikitext","details":"### Summary\nArbitrary HTML can be inserted into the DOM by inserting a payload into any allowed attribute of the `\u003ctabber\u003e` tag.\n\n### Details\n\nThe `args` provided within the wikitext as attributes to the `\u003ctabber\u003e` tag are passed to the TabberComponentTabs class:\nhttps://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue/blob/3a23b703ce36cfc4128e7921841f68230be4059a/includes/Tabber.php#L76\n\nIn TabberComponentTabs, the attributes are validated before being supplied to the Tabs template.\nhttps://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue/blob/3a23b703ce36cfc4128e7921841f68230be4059a/includes/Components/TabberComponentTabs.php#L15-L31\nHowever, the validation is insufficient.\nWhat `Sanitizer::validateTagAttributes` does is call `validateAttributes`, which\n```\n\t * - Discards attributes not on the given list\n\t * - Unsafe style attributes are discarded\n\t * - Invalid id attributes are re-encoded\n```\nHowever, the attribute values are expected to be escaped when inserted into HTML.\n\nThe attribute values are then inserted into HTML without being escaped:\nhttps://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue/blob/3a23b703ce36cfc4128e7921841f68230be4059a/includes/templates/Tabs.mustache#L1\n\n### PoC\n#### XSS through attributes:\n1. Go to Special:ExpandTemplates and insert the following wikitext:\n```\n\u003ctabber class='test123\" onmouseenter=\"alert(1)\"'\u003e\n|-|First Tab Title=\nFirst tab content goes here.\n\u003c/tabber\u003e\n```\n2. Press \"OK\"\n3. Hover over the tabber\n\n![image](https://github.com/user-attachments/assets/bb65a587-e277-4936-b9f9-400ad7c39040)\n\n\n#### XSS through script tags:\n1. Go to Special:ExpandTemplates and insert the following wikitext:\n```\n\u003ctabber class='test123\"><script>alert(2)</script>'\u003e\n|-|First Tab Title=\nFirst tab content goes here.\n\u003c/tabber\u003e\n```\n2. Press \"OK\"\n![image](https://github.com/user-attachments/assets/a51ede5c-f9a0-49be-875e-37d30a083721)\n\n### Impact\nArbitrary HTML can be inserted into the DOM by any user, allowing for JavaScript to be executed.","aliases":["CVE-2025-53093"],"modified":"2025-06-27T21:42:16.750392Z","published":"2025-06-27T20:50:40Z","database_specific":{"cwe_ids":["CWE-79","CWE-80"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2025-06-27T20:50:40Z","nvd_published_at":"2025-06-27T18:15:50Z"},"references":[{"type":"WEB","url":"https://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue/security/advisories/GHSA-jfj7-249r-7j2m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53093"},{"type":"WEB","url":"https://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue/commit/4cdf217ef96da74a1503d1dd0bb0ed898fc2a612"},{"type":"WEB","url":"https://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue/commit/62ce0fcdf32bd3cfa77f92ff6b940459a14315fa"},{"type":"PACKAGE","url":"https://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue"},{"type":"WEB","url":"https://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue/blob/3a23b703ce36cfc4128e7921841f68230be4059a/includes/Components/TabberComponentTabs.php#L15-L31"},{"type":"WEB","url":"https://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue/blob/3a23b703ce36cfc4128e7921841f68230be4059a/includes/Tabber.php#L76"},{"type":"WEB","url":"https://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue/blob/3a23b703ce36cfc4128e7921841f68230be4059a/includes/templates/Tabs.mustache#L1"}],"affected":[{"package":{"name":"starcitizentools/tabber-neue","ecosystem":"Packagist","purl":"pkg:composer/starcitizentools/tabber-neue"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.1.1"}]}],"versions":["v3.0.0","v3.1.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/06/GHSA-jfj7-249r-7j2m/GHSA-jfj7-249r-7j2m.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L"}]}