CVE-2025-49579: Starcitizentools/citizen skin Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-g3cp-pq72-hjpv
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CVSS 6.5
CWE-79
Published
Advisory Summary

CVE-2025-49579 is a MODERATE (CVSS 6.5) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Starcitizentools/citizen skin libraries in the Packagist ecosystem. The issue involves starcitizentools/citizen-skin allows stored xss in menu heading message. Remediation is available by upgrading affected packages to version 3.3.1.

CVE-2025-49579 at a Glance

CVE Identifier CVE-2025-49579
GHSA Identifier GHSA-g3cp-pq72-hjpv
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Starcitizentools/citizen skin
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2025-49579

To remediate this vulnerability, upgrade all affected Starcitizentools/citizen skin dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

starcitizentools/citizen-skin fixed: 3.3.1 
Upgrade starcitizentools/citizen-skin to 3.3.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for starcitizentools/citizen-skin

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-49579, inspect your project dependencies for Starcitizentools/citizen skin:

inspect dependencies for starcitizentools/citizen-skin

Analyze the terminal output to locate any version of Starcitizentools/citizen skin in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.3.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Starcitizentools/citizen skin, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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.: ![image](https://github.com/user-attachments/assets/6a18ec77-d2a0-4a0d-b4aa-83359304659a) ![image](https://github.com/user-attachments/assets/eaadb8e1-58b6-41be-90d2-829c50cf75ac) 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.

CVE-2025-49579 Affected Starcitizentools/citizen skin Versions

1 component(s)
Fixed Versions:
3.3.1
Product / Package Ecosystem Affected Versions Fixed Version
starcitizentools/citizen-skin
 Packagist
≥ 2.4.2
< 3.3.1
3.3.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/StarCitizenTools/mediawiki-skins-Citizen/security/advisories/GHSA-g3cp-pq72-hjpv
NVD — CVE-2025-49579 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-49579
Security Fix Commit FIX COMMIT
https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/54c8717d45ce1594918f11cb9ce5d0ccd8dfee65
Security Fix Commit FIX COMMIT
https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/93c36ac778397e0e7c46cf7adb1e5d848265f1bd
Starcitizentools/citizen skin Source Repository REPOSITORY
https://github.com/StarCitizenTools/mediawiki-skins-Citizen

Frequently Asked Questions

What is CVE-2025-49579?
CVE-2025-49579 is a security vulnerability in Starcitizentools/citizen skin involving starcitizentools/citizen-skin allows stored XSS in menu heading message under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Starcitizentools/citizen skin versions are affected?
Affected versions include releases prior to 3.3.1 across affected packages: starcitizentools/citizen-skin.
What version fixes CVE-2025-49579?
Upgrading to 3.3.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is starcitizentools/citizen-skin affected?
Yes, starcitizentools/citizen-skin is affected in releases prior to 3.3.1. Upgrade your dependency to 3.3.1 or later.
What is the CVSS score of CVE-2025-49579?
CVE-2025-49579 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2025-49579?
CVE-2025-49579 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2025-49579?
Run the dependency tree command: 'inspect dependencies for starcitizentools/citizen-skin'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-g3cp-pq72-hjpv",
  "modified" : "2025-06-13T14:08:31Z",
  "published" : "2025-06-13T14:08:31Z",
  "aliases" : [ "CVE-2025-49579" ],
  "summary" : "starcitizentools/citizen-skin allows stored XSS in menu heading message",
  "details" : "### Summary\nAll 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.\n\n### Details\nThe system messages for menu headings are inserted unescaped into raw HTML:\nhttps://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/072e4365e9084e4b153eac62d3666566c06f5a49/templates/Menu.mustache#L8-L10\n\n### PoC\n1. Go to any article using citizen with the `uselang` parameter set to `x-xss`\n2. A large number of alerts will be shown for various messages, e.g.:\n![image](https://github.com/user-attachments/assets/6a18ec77-d2a0-4a0d-b4aa-83359304659a)\n![image](https://github.com/user-attachments/assets/eaadb8e1-58b6-41be-90d2-829c50cf75ac)\n\nOn 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`.\n\n### Impact\nThis impacts wikis where a group has the `editinterface` but not the `editsitejs` user right.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "starcitizentools/citizen-skin"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.4.2"
      }, {
        "fixed" : "3.3.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/StarCitizenTools/mediawiki-skins-Citizen/security/advisories/GHSA-g3cp-pq72-hjpv"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-49579"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/54c8717d45ce1594918f11cb9ce5d0ccd8dfee65"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/StarCitizenTools/mediawiki-skins-Citizen/commit/93c36ac778397e0e7c46cf7adb1e5d848265f1bd"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/StarCitizenTools/mediawiki-skins-Citizen"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-13T14:08:31Z",
    "nvd_published_at" : "2025-06-12T19:15:20Z"
  }
}