CVE-2025-53499

Unauthorized Inspection of Protected Variables in AbuseFilter

9.1 Critical

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

0.33%Up 0.3 points since Jul 8, 2025

What each source reports

CVE List Score used 9.1

Unauthorized Inspection of Protected Variables in AbuseFilter

Record: CVE-2025-53499
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-862
Updated: 2026-11-02

EUVDEUVD-2025-20313 9.1

Record: EUVD-2025-20313
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-f8g8-423p-p43f 9.1

: Missing Authorization vulnerability in Wikimedia Foundation Mediawiki - AbuseFilter Extension...

: Missing Authorization vulnerability in Wikimedia Foundation Mediawiki - AbuseFilter Extension allows Unauthorized Access.This issue affects Mediawiki - AbuseFilter Extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.

Record: GHSA-f8g8-423p-p43f
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-862
Updated: 2026-11-02

NVD 9.1

Record: CVE-2025-53499
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-862
Updated: 2026-11-02

Affected products

wikimedia foundation mediawiki - abusefilter extension

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-53499 is a critical vulnerability (CVSS 9.1) in Wikimedia Foundation Mediawiki - Abusefilter Extension, published July 7, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. No source names a fixed version.