starcitizentools/citizen-skin allows stored XSS in search no result messages

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

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

EPSS

• CVE-2025-49576: 0.43% estimated exploitation activity in the next 30 days; percentile 36.86 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary The citizen-search-noresults-title and citizen-search-noresults-desc system messages are inserted into raw HTML, allowing anybody who can edit those messages to insert arbitrary HTML into the DOM. Details The system messages are inserted as raw HTML by the mustache template: https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/407052e7069bdeae927d6f1a2a1c9a45b473bf9a/resources/skins.citizen.search/templates/TypeaheadPlaceholder.mustache#L8-L9 PoC 1. Edit citizen-search-noresults-title and citizen-search-noresults-desc to <img src="" onerror="alert('citizen-search-noresults-title')" and <img src="" onerror="alert('citizen-search-noresults-desc')" (script tags don't work here due to the way the HTML is inserted) 2. Open the search bar and search for a page that doesn't exist to get the "no results" messages to show up Impact This impacts wikis where a group has the editinterface but not the editsitejs user right.

Published by the source

13 Jun 2025, 14:07 UTC

Last modified by the source

13 Jun 2025, 14:07 UTC

Source last checked

26 Oct 2026, 14:33 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-86xf-2mgp-gv3g

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# Patch Next advisory brief: CVE-2025-49576

Advisory: starcitizentools/citizen-skin allows stored XSS in search no result messages
IDs: CVE-2025-49576, GHSA-86xf-2mgp-gv3g
Record: https://patchnext.com/advisories/cve-2025-49576 (revision 1, source checked 26 Oct 2026, 14:33 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: starcitizentools/citizen-skin 3.3.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist starcitizentools/citizen-skin: affected >= 2.31.0, < 3.3.1; fixed in 3.3.1

## Suggested inspection (read-only)
- Packagist starcitizentools/citizen-skin: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on starcitizentools/citizen-skin.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-86xf-2mgp-gv3g (GitHub-reviewed advisory GHSA-86xf-2mgp-gv3g lists affected ranges: Packagist starcitizentools/citizen-skin >=2.31.0 <3.3.1)

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