starcitizentools/citizen-skin allows stored XSS in menu heading message
### Summary All system messages in menu headings using the Menu.mustache template are inserted as raw HTML, allowing anybody who can edit those messages to insert arbitrary HTML into the DOM. ### Details The system messages for menu headings are inserted unescaped into raw HTML: https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/072e4365e9084e4b153eac62d3666566c06f5a49/templates/Menu.mustache#L8-L10 ### PoC 1. Go to any article using citizen with the `uselang` parameter set to `x-xss` 2. A large number of alerts will be shown for various messages, e.g.:   On the main page of my test wiki, the following messages were shown: `navigation`, `notifications`, `user-interface-preferences`, `personaltools`, `variants`, `views`, `associated-pages`, `cactions` and `toolbox`. ### Impact This impacts wikis where a group has the `editinterface` but not the `editsitejs` user right.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-49579US | medium4.8 | — | ||
Citizen is a MediaWiki skin that makes extensions part of the cohesive experience. All system messages in menu headings using the Menu.mustache template are inserted as raw HTML, a… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/StarCitizenTools/mediawiki-skins-CitizenPACKAGE
- https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/54c8717d45ce1594918f11cb9ce5d0ccd8dfee65WEB
- https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/93c36ac778397e0e7c46cf7adb1e5d848265f1bdWEB
- https://github.com/StarCitizenTools/mediawiki-skins-Citizen/security/advisories/GHSA-g3cp-pq72-hjpvWEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-49579ADVISORY
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