10

CVE-2025-12004: the wikimedia foundation mediawiki - lockdown extension

CVSS: 10.0v4.0CriticalDeferred
AliasesUBUNTU-CVE-2025-12004
Published 21-10-2025Last modified 21-10-2025
Open JSON

Vulnerability summary

CVE-2025-12004 is a critical (CVSS 10.0) vulnerability in the wikimedia foundation mediawiki - lockdown extension. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
10.0/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.40%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-10-2025
    PublishedVulnerability first disclosed.
  2. 21-10-2025
    Last modifiedVulnerability information updated.

Description

Incorrect Permission Assignment for Critical Resource vulnerability in The Wikimedia Foundation Mediawiki - Lockdown Extension allows Privilege Abuse. Fixed in Mediawiki Core Action APIThis issue affects Mediawiki - Lockdown Extension: from master before 1.42.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

+0.08 pp

From 0.32% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.40%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

The wikimedia foundation1 product
Ubuntu1 product
  • mediawikiAll versions (No fix recorded)

2 vendors · 2 products

References

4 links