starcitizentools/citizen-skin allows stored XSS in preference menu heading messages
### Summary Various preferences messages are inserted into raw HTML, allowing anybody who can edit those messages to insert arbitrary HTML into the DOM. ### Details The `innerHtml` of the label div is set to the `textContent` of the label, essentially unsanitizing the system messages: https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/407052e7069bdeae927d6f1a2a1c9a45b473bf9a/resources/skins.citizen.preferences/addPortlet.polyfill.js#L18 ### PoC 1. Edit `citizen-feature-custom-font-size-name` (or any other message displayed in a heading in the preferences menu) to `<img src="" onerror="alert('citizen-feature-custom-font-size-name')">` (script tags don't work here due to the way the HTML is inserted) 2. Open the preferences menu 
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-49577US | medium5.4 | — | ||
Citizen is a MediaWiki skin that makes extensions part of the cohesive experience. Various preferences messages are inserted into raw HTML, allowing anybody who can edit those mess… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/StarCitizenTools/mediawiki-skins-CitizenPACKAGE
- https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/93c36ac778397e0e7c46cf7adb1e5d848265f1bdWEB
- https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/a741639085d70c22a9f49890542a142a223bf981WEB
- https://github.com/StarCitizenTools/mediawiki-skins-Citizen/security/advisories/GHSA-jwr7-992g-68mhWEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-49577ADVISORY
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