starcitizentools/citizen-skin allows stored XSS in user registration date message
Summary
Various 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.
Details
The result of $this->lang->userDate( $timestamp, $this->user ) returns unescaped values, but is inserted as raw HTML by Citizen:
https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/072e4365e9084e4b153eac62d3666566c06f5a49/includes/Components/CitizenComponentUserInfo.php#L55-L60
PoC
- Go to any page using citizen with the uselang parameter set to x-xss and while being logged in
Depending on the registration date of the account you're logged in with, various messages can be shown. In my case, it's
november:
Impact
This impacts wikis where a group has the editinterface but not the editsitejs user right.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | starcitizentools/citizen-skin | >= 3.3.0, < 3.3.1 | 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
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N- Weakness (CWE)
CWE-79- Platform
- Composer
- Package
starcitizentools/citizen-skin- Disclosed
- 13.06.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-2v3v-3whp-953h - CC BY 4.0
Vulnerability history: starcitizentools/citizen-skin
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 9
- First → latest
- 09.2024 10.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 7
Disclosures per year
- 2024: 1
- 2025: 8
- 2026: 0
-
starcitizentools/citizen-skin allows stored XSS in user registration date message this entry
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