Vulnerability · Published Feb 2, 2026 · Assigned by wikimedia-foundation
CVE-2025-6594XSS in Special:ApiSandbox
Medium 4.7
In plain English
A medium-severity cross-site scripting in MediaWiki from Wikimedia Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | mediawiki | 1:1.39.13-1~deb12u1 | DSA-5957-1 |
| Debian:12 | mediawiki | 1:1.39.13-1~deb12u1 | DEBIAN-CVE-2025-6594 |
| Debian:13 | mediawiki | 1:1.43.3+dfsg-1 | DEBIAN-CVE-2025-6594 |
| Debian:14 | mediawiki | 1:1.43.3+dfsg-1 | DEBIAN-CVE-2025-6594 |
| Ubuntu:25.10 | mediawiki | no fix listed | UBUNTU-CVE-2025-6594 |
| Ubuntu:26.04:LTS | mediawiki | no fix listed | UBUNTU-CVE-2025-6594 |
| Ubuntu:26.10 | mediawiki | no fix listed | UBUNTU-CVE-2025-6594 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wikimedia Foundation | MediaWiki | 1.27.0 – before 1.39.13, 1.42.7 1.43.2, 1.44.0 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N