CVE-2025-49578
starcitizentools/citizen-skin allows stored XSS in user registration date message
Impact
### 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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | starcitizentools/citizen-skin | >= 3.3.0, < 3.3.1 | 3.3.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Starcitizen.Tools | Citizen | before 3.3.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- 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/security/advisories/GHSA-2v3v-3whp-953h
- https://github.com/advisories/GHSA-2v3v-3whp-953h
- https://nvd.nist.gov/vuln/detail/CVE-2025-49578