CVE-2025-6594 - XSS in Special:ApiSandbox

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HIGH

XSS in Special:ApiSandbox

Published Feb 2, 2026

8.1

HIGH

CVSS 3.1

EPSS 0.32%

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Special.Apisandbox/ApiSandbox.Js.

This issue affects MediaWiki: from 1.27.0 before 1.39.13, 1.42.7 1.43.2, 1.44.0.

Affected products

Vendor Wikimedia Foundation Product MediaWiki Default
unaffected
- Version
  1.27.0
  Status
  affected
  Constraints
  <1.39.13, 1.42.7 1.43.2, 1.44.0

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Wikimedia Foundation

MediaWiki

unaffected

Version	Status	Constraints
1.27.0	affected	<1.39.13, 1.42.7 1.43.2, 1.44.0

Remediation

Red Hat statement

This Cross-site Scripting (XSS) vulnerability in MediaWiki's `Special:ApiSandbox` component requires user interaction for exploitation. The flaw affects MediaWiki versions from 1.27.0 before 1.39.13, 1.42.7 1.43.2, and 1.44.0. This issue primarily impacts deployments of MediaWiki within Community Projects, such as Fedora.

Red Hat mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (6)

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2025-6594		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2436122		Issue Tracking
https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-206671		Advisory
https://nvd.nist.gov/vuln/detail/CVE-2025-6594
https://phabricator.wikimedia.org/T395063
https://www.cve.org/CVERecord?id=CVE-2025-6594