GHSA-jwr7-992g-68mh
starcitizentools/citizen-skin allows stored XSS in preference menu heading messages
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | starcitizentools/citizen-skin | >= 2.13.0, < 3.3.1 | 3.3.1 |
Details
As written in the advisory (Markdown source, shown as plain text).
### 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
References
External links from the advisory. They lead to third-party sites.
- https://github.com/StarCitizenTools/mediawiki-skins-Citizen/security/advisories/GHSA-jwr7-992g-68mh
- https://nvd.nist.gov/vuln/detail/CVE-2025-49577
- https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/93c36ac778397e0e7c46cf7adb1e5d848265f1bd
- https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/a741639085d70c22a9f49890542a142a223bf981
- https://github.com/StarCitizenTools/mediawiki-skins-Citizen