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CVE-2025-53370 — Vulnerability in starcitizentools/citizen-skin —...

HIGH

Citizen vulnerable to Stored XSS through short descriptions

Published July 3, 2025Updated July 3, 2025Source: osv

Summary

### Summary Short descriptions set via the [ShortDescription extension](https://www.mediawiki.org/wiki/Extension:ShortDescription) are inserted as raw HTML by the Citizen skin, allowing any user to insert arbitrary HTML into the DOM by editing a page. ### Details The `shortdesc` property, which contains unsanitized user input, is retrieved from the OutputPage and returned as the tagline: https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/0d8a44011e02a081618359a1e90f462478e807aa/includes/Components/CitizenComponentPageHeading.php#L249-L251 The tagline is then provided to the template data: https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/0d8a44011e02a081618359a1e90f462478e807aa/includes/Components/CitizenComponentPageHeading.php#L270-L275 The template then inserts the tagline into raw HTML without doing any escaping: https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/0d8a44011e02a081618359a1e90f462478e807aa/templates/PageHeading.mustache#L12 ### PoC 1. Enable Citizen and ShortDescription 2. Add `{{SHORTDESC:<img src="" onerror="alert('citizen shortdescription xss')">}}` to a page 3. Visit the page ![image](https://github.com/user-attachments/assets/d45f3626-c5eb-4477-86af-d15d3a1edb96) ![image](https://github.com/user-attachments/assets/84a8c447-d441-4bd6-b6d6-48e504527c4e) ### Impact Arbitrary HTML can be inserted into the DOM by any user, allowing for JavaScript to be executed.

Advisory Timeline

  • First published July 3, 2025 (466 days ago).
  • Last revised July 3, 2025 — 0 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Composer
Update starcitizentools/citizen-skin to 3.4.0 or later
composer require "starcitizentools/citizen-skin:^3.4.0"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: packagist (1).

PackageEcosystemAffectedFixed In
starcitizentools/citizen-skin
packagist
v1.10.0, v1.13.0, v1.14.0, v1.14.1 (+129 more)3.4.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-79
    Cross-site Scripting (XSS)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.6 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

References

Frequently Asked Questions

What is CVE-2025-53370?
Citizen vulnerable to Stored XSS through short descriptions This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.6/10).
How do I check if my project is affected by CVE-2025-53370?
CVE-2025-53370 affects starcitizentools/citizen-skin. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-53370 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.6

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-prmv-7r8c-794g

Related CVEs

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    PHPCSUtils: Remote code execution via eval() in AbstractArrayDeclarationSniff::getActualArrayKey()

  • CVE-2025-53368
    HIGH

    starcitizentools/citizen-skin is vulnerable to Stored XSS attack in the legacy search bar through page descriptions

  • CVE-2026-61825
    HIGH

    code16/sharp has a stored XSS via data-html-content Sanitizer Bypass

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