{"id":"GHSA-p85q-mww9-gwqf","aliases":["CVE-2025-53369"],"title":"Citizen Short Description stored XSS vulnerability through wikitext","description":"### Summary\nShort descriptions are not properly sanitized by the ShortDescription before being inserted as HTML using `mw.util.addSubtitle`, allowing any user to insert arbitrary HTML into the DOM by editing a page.\n\n### Details\nThe description provided by the user via the `{{SHORTDESC:}}` parser function is insufficiently sanitized by the `sanitize()` function, as html entities are decoded:\nhttps://github.com/StarCitizenTools/mediawiki-extensions-ShortDescription/blob/7244b1e8b5cb6dbd7e546c5be7fed8a56e33d065/includes/Hooks/ParserHooks.php#L147-L159\nVia JS, the short description is then passed to `mw.util.addSubtitle`, which inserts it as raw HTML:\nhttps://github.com/StarCitizenTools/mediawiki-extensions-ShortDescription/blob/7244b1e8b5cb6dbd7e546c5be7fed8a56e33d065/modules/ext.shortDescription.js#L8\nhttps://github.com/wikimedia/mediawiki/blob/96372101b3c579d9992e8a31a3ccd90a937cac47/resources/src/mediawiki.util/util.js#L552-L563\n\n### PoC\n1. Enable ShortDescription\n2. Make sure `$wgShortDescriptionEnableTagline` is set to `true` (this is the default)\n3. Create a page and insert the following wikitext: `{{SHORTDESC:<img src=\"\" onerror=\"alert('shortdescription xss')\">}}`\n4. Visit the page\n\n![image](https://github.com/user-attachments/assets/8e467f28-3bb5-4462-b28b-14e145be743f)\n![image](https://github.com/user-attachments/assets/39e132c3-6a92-4f24-8aef-b915e8560f63)\n\n\n### Impact\nArbitrary HTML can be inserted into the DOM by any user, allowing for JavaScript to be executed.","severity":"high","score":8.6,"published":"2025-07-03T21:38:37.000Z","modified":"2025-07-03T22:27:19.935Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"starcitizentools/short-description","ranges":[{"events":[{"introduced":"4.0.0"},{"fixed":"4.0.1"}],"type":"ECOSYSTEM"}],"versions":[],"fixed":["4.0.1"]}],"references":["https://github.com/StarCitizenTools/mediawiki-extensions-ShortDescription/security/advisories/GHSA-p85q-mww9-gwqf","https://nvd.nist.gov/vuln/detail/CVE-2025-53369","https://github.com/StarCitizenTools/mediawiki-extensions-ShortDescription/commit/bc4fdbaeb1dff127fb6d08c0d385b64aa128c8f8","https://github.com/StarCitizenTools/mediawiki-extensions-ShortDescription"],"sources":[{"name":"OSV","id":"GHSA-p85q-mww9-gwqf","modified":"2025-07-03T22:27:19.935348Z","url":"https://osv.dev/vulnerability/GHSA-p85q-mww9-gwqf"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L","score":8.6}]}