What’s Vulnerable › Vulnerabilities

CVE-2025-49579: Citizen allows stored XSS in menu heading message

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-06-12 · updated 2026-06-17
• Weakness: CWE-79

Description

Citizen is a MediaWiki skin that makes extensions part of the cohesive experience. 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. This impacts wikis where a group has the `editinterface` but not the `editsitejs` user right. This vulnerability is fixed in 3.3.1.

Affected products

• StarCitizenTools mediawiki-skins-Citizen: before 3.3.1 — fixed in 3.3.1

How to fix

Upgrade to a fixed version: StarCitizenTools mediawiki-skins-Citizen 3.3.1. Check the vendor advisory for mitigations.

References

• https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/54c8717d45ce1594918f11cb9ce5d0ccd8dfee65
• https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/93c36ac778397e0e7c46cf7adb1e5d848265f1bd
• https://github.com/StarCitizenTools/mediawiki-skins-Citizen/security/advisories/GHSA-g3cp-pq72-hjpv

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