What is CVE-2025-6590?

CVE-2025-6590 is a vulnerability in Wikimedia Foundation MediaWiki, classified under Information Disclosure. Published 2026-02-02.

Is CVE-2025-6590 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Information disclosure in Wikimedia Foundation MediaWiki

CVE-2025-6590

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/htmlform/fields/HTMLUserTextField.Php. This issue affects MediaWiki: from * through 1.39.12, 1.42.76 1.43.1, 1.44.0.

Vulnerability class: Information Disclosure

EPSS: 0.003 (24.9th percentile) — read the EPSS interpretation.

Affected products

Wikimedia Foundation Mediawiki

Weakness classification (CWE)

CWE-200 — Information Disclosure

Public proof-of-concept exploits

w4zu/Debian_

References

c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

Frequently asked questions

What is CVE-2025-6590?: CVE-2025-6590 is a vulnerability in Wikimedia Foundation MediaWiki, classified under Information Disclosure. Published 2026-02-02.
Is CVE-2025-6590 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.