{"id":"GHSA-2v3v-3whp-953h","aliases":["CVE-2025-49578"],"title":"starcitizentools/citizen-skin allows stored XSS in user registration date message","description":"### Summary\nVarious date messages returned by `Language::userDate` are inserted into raw HTML, allowing anybody who can edit those messages to insert arbitrary HTML into the DOM.\n\n### Details\nThe result of `$this->lang->userDate( $timestamp, $this->user )` returns unescaped values, but is inserted as raw HTML by Citizen:\nhttps://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/072e4365e9084e4b153eac62d3666566c06f5a49/includes/Components/CitizenComponentUserInfo.php#L55-L60\n\n### PoC\n1. Go to any page using citizen with the uselang parameter set to x-xss and while being logged in\nDepending on the registration date of the account you're logged in with, various messages can be shown. In my case, it's `november`:\n![image](https://github.com/user-attachments/assets/252a3453-99c8-4ce1-b6d6-a8485b7a9a43)\n\n\n### Impact\nThis impacts wikis where a group has the `editinterface` but not the `editsitejs` user right.","severity":"medium","score":6.5,"published":"2025-06-13T14:09:00.000Z","modified":"2025-06-13T14:29:35.716Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"starcitizentools/citizen-skin","ranges":[{"events":[{"introduced":"3.3.0"},{"fixed":"3.3.1"}],"type":"ECOSYSTEM"}],"versions":["v3.3.0"],"fixed":["3.3.1"]}],"references":["https://github.com/StarCitizenTools/mediawiki-skins-Citizen/security/advisories/GHSA-2v3v-3whp-953h","https://nvd.nist.gov/vuln/detail/CVE-2025-49578","https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/64cb5d7ab3a6dc0381fae54b31e8fc4afadc8beb","https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/93c36ac778397e0e7c46cf7adb1e5d848265f1bd","https://github.com/StarCitizenTools/mediawiki-skins-Citizen"],"sources":[{"name":"OSV","id":"GHSA-2v3v-3whp-953h","modified":"2025-06-13T14:29:35.716971Z","url":"https://osv.dev/vulnerability/GHSA-2v3v-3whp-953h"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","score":6.5}]}