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CVE-2025-61643VulnerabilityPublished

CVE-2025-61643: Wikimedia Foundation MediaWiki · Vulnerability

Affects Wikimedia Foundation MediaWikiSource CVE Database V5

0

Not known to be exploited · CVSS 2.7 Low : upgrade to 1.39.14 when convenient.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 4.0 base score
2.7Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.39.14
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/RE:M/U:Green

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 2026-10-26.

What to do

Upgrade Wikimedia Foundation MediaWiki to 1.39.14.

Affected software

ProductAffectedFixed in
Wikimedia FoundationMediaWikiAffected
  • < 1.39.14, 1.43.4, 1.44.1
Fixed in
  • 1.39.14

AI-suggested

European organizations should ensure that all MediaWiki instances are updated to versions 1.39.14, 1.43.4, 1.44.1, or later, as these contain fixes for CVE-2025-61643. In the interim, restricting public access to the recent changes feed or implementing network-level controls to limit exposure of MediaWiki instances can reduce risk. Regularly auditing MediaWiki configurations and logs for unusual activity related to recent changes feeds is advisable. Employing web application firewalls (WAFs) with custom rules to detect anomalous requests targeting the RecentChangeRCFeedNotifier.php endpoint can provide additional protection. Finally, integrating MediaWiki updates into routine patch management cycles ensures timely remediation of this and future vulnerabilities.

Description

CVE-2025-61643 is a low-severity vulnerability in the Wikimedia Foundation's MediaWiki software affecting versions prior to 1.39.14, 1.43.4, and 1.44.1. The issue is located in the RecentChangeRCFeedNotifier.php file, potentially impacting the recent changes feed functionality. The CVSS 4.

References

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