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VulnerabilityPublished Updated

CVE-2025-67484: Wikimedia Foundation MediaWiki

Affects mediawikiSource GCVE Database

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Not known to be exploited · CVSS 9.8 Critical.

Data as of 5 Nov 2026, 00:01 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.

Contested

Critical score, yet low EPSS after six months
EPSS
0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 4 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10mediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=stonkingOther threatsAffected
  • =1:1.43.8+dfsg-2
  • =1:1.43.9+dfsg-1
  • =1:1.43.9+dfsg-1ubuntu1
Fixed in–
Ubuntu 25.10mediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=questingOther threatsAffected
  • =1:1.43.1+dfsg-1
  • =1:1.43.1+dfsg-2
  • =1:1.43.3+dfsg-1
Fixed in–
Ubuntu Pro 24.04 LTSmediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps/nobleOther threatsAffected
  • 1:1.39.4-2 – 1:1.39.7-1ubuntu0.1~esm1
5 affected builds
Fixed in–
Ubuntu Pro 22.04 LTSmediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps/jammyOther threatsAffected
  • 1:1.35.3-1 – 1:1.35.6-1ubuntu0.1~esm1
8 affected builds
Fixed in–
Ubuntu Pro 20.04 LTSmediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps/focalOther threatsAffected
  • 1:1.31.2-1ubuntu1 – 1:1.31.7-1ubuntu0.1~esm1
9 affected builds
Fixed in–
Ubuntu 18.04 LTSmediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=bionicOther threatsAffected
  • 1:1.27.3-1 – 1:1.27.4-3
4 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

The vulnerability affects versions prior to 1.39.16, 1.43.6, 1.44.3, and 1.45.1. Users should upgrade to these or later versions where the issue is fixed. No cloud service remediation applies as this is self-hosted software. There is no indication of known exploits in the wild at this time.

Description

A critical vulnerability (CVE-2025-67484) exists in Wikimedia Foundation MediaWiki affecting multiple versions prior to 1.39.16, 1.43.6, 1.44.3, and 1.45.1. The issue is related to the program file includes/Api/ApiFormatXml.Php. The vulnerability has a CVSS score of 9.8, indicating high severity with network attack vector, no privileges required, no user interaction, and impacts confidentiality, integrity, and availability.

References

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