CVE-2025-49579
starcitizentools/citizen-skin allows stored XSS in menu heading message
Description
### 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.
How to fix CVE-2025-49579
To remediate CVE-2025-49579, upgrade the affected package to a fixed version below.
- —upgrade to 3.3.1 or later
Is CVE-2025-49579 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 2.4.2, < 3.3.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N |
References (5)
- ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-49579
- PATCHgithub.com/StarCitizenTools/mediawiki-skins-Citizen
- WEBgithub.com/StarCitizenTools/mediawiki-skins-Citizen/commit/54c8717d45ce1594918f11cb9ce5d0ccd8dfee65
- WEBgithub.com/StarCitizenTools/mediawiki-skins-Citizen/commit/93c36ac778397e0e7c46cf7adb1e5d848265f1bd