CVE-2025-53495: Unauthorized Disclosure of IP Reputation in AbuseFilter

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-07 · updated 2026-06-17
Weakness: CWE-862

Description

Missing Authorization vulnerability in Wikimedia Foundation Mediawiki - AbuseFilter Extension allows Unauthorized Access.This issue affects Mediawiki - AbuseFilter Extension: from 1.43.X before 1.43.2.

Affected products

Wikimedia Foundation Mediawiki - AbuseFilter Extension: from 1.43.x before 1.43.2 — fixed in 1.43.2

How to fix

Upgrade to a fixed version: Wikimedia Foundation Mediawiki - AbuseFilter Extension 1.43.2. Check the vendor advisory for mitigations.

References

https://gerrit.wikimedia.org/r/c/mediawiki/extensions/AbuseFilter/+/1166040
https://phabricator.wikimedia.org/T396750

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