CVE-2025-49578
starcitizentools/citizen-skin allows stored XSS in user registration date message
Description
### 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 1. 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.
How to fix CVE-2025-49578
To remediate CVE-2025-49578, upgrade the affected package to a fixed version below.
- —upgrade to 3.3.1 or later
Is CVE-2025-49578 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 3.3.0, < 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-2025-49578
- PATCHgithub.com/StarCitizenTools/mediawiki-skins-Citizen
- WEBgithub.com/StarCitizenTools/mediawiki-skins-Citizen/commit/64cb5d7ab3a6dc0381fae54b31e8fc4afadc8beb
- WEBgithub.com/StarCitizenTools/mediawiki-skins-Citizen/commit/93c36ac778397e0e7c46cf7adb1e5d848265f1bd