Vulnerability · Published Feb 2, 2026 · Assigned by wikimedia-foundation
CVE-2025-6591HTML injection in API action=feedcontributions output from i18n message
None 0.0
In plain English
A 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 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)0.0None
Exploit odds (30 days)0.4%top 61.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/api/ApiFeedContributions.Php. This issue affects MediaWiki: from * 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-2025-6591 |
| Debian:13 | mediawiki | 1:1.43.3+dfsg-1 | DEBIAN-CVE-2025-6591 |
| Debian:14 | mediawiki | 1:1.43.3+dfsg-1 | DEBIAN-CVE-2025-6591 |
| Ubuntu:25.10 | mediawiki | no fix listed | UBUNTU-CVE-2025-6591 |
| Ubuntu:26.04:LTS | mediawiki | no fix listed | UBUNTU-CVE-2025-6591 |
| Ubuntu:26.10 | mediawiki | no fix listed | UBUNTU-CVE-2025-6591 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wikimedia Foundation | MediaWiki | * – before 1.39.13, 1.42.7 1.43.2, 1.44.0 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N