XSS in Wikimedia Foundation MediaWiki

CVE-2025-6591

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

EPSS exploit prediction

EPSS: 0.004 (36.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-6591: held from 0.005 to 0.004.

EPSS over last 30 days · oldest: 0.005 · newest: 0.004 · change: -0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-6591?
CVE-2025-6591 is a vulnerability in Wikimedia Foundation MediaWiki, classified under Cross-site Scripting. Published 2026-02-02.
Is CVE-2025-6591 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.