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CVE-2025-23073VulnerabilityPublished Updated

CVE-2025-23073: Wikimedia Foundation Mediawiki – GlobalBlocking Extension · Information Exposure

Affects Wikimedia Foundation Mediawiki – GlobalBlocking ExtensionSource CVE Database V5

0

Not known to be exploited · CVSS 3.5 Low.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
3.5Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 28% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 Jan 2025

  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

AI-suggested

1. Immediately audit MediaWiki installations to determine if the GlobalBlocking Extension master branch or development versions are in use, especially in staging or test environments. 2. Restrict network access to MediaWiki instances running the vulnerable extension to trusted users only, using network segmentation and access control lists. 3. Monitor logs for unusual access patterns or attempts to retrieve sensitive data from the GlobalBlocking Extension endpoints. 4. Avoid deploying development or master branch versions of MediaWiki extensions in production environments. 5. Once patches or updates are released by the Wikimedia Foundation, apply them promptly to remove the vulnerability. 6. Implement strict role-based access controls within MediaWiki to limit privileges that could be exploited to retrieve sensitive data. 7. Educate administrators about the risks of running unpatched or development branch software and encourage adherence to stable release channels. 8. Consider additional application-layer protections such as Web Application Firewalls (WAFs) to detect and block suspicious requests targeting the GlobalBlocking Extension.

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - GlobalBlocking Extension allows Retrieve Embedded Sensitive Data. This issue briefly impacted the master branch of MediaWiki’s GlobalBlocking Extension.

References

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