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VulnerabilityPublished Updated

CVE-2025-32079: The Wikimedia Foundation Mediawiki – GrowthExperiments · Improper Input Validation

Affects The Wikimedia Foundation Mediawiki – GrowthExperimentsSource CVE Database V5

0

Not known to be exploited · CVSS 6.5 Medium.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Apr 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 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
GitHubwikimedia/extensions/GrowthExperimentspkg:github/wikimedia/extensions/GrowthExperimentsOther threatsAffected
  • =1.39
Fixed in–

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AI-suggested

To mitigate this vulnerability, European organizations should promptly identify and inventory all Mediawiki instances, particularly those running GrowthExperiments versions 1.39 through 1.43. Since no official patches are currently linked, organizations should monitor The Wikimedia Foundation's security advisories for updates or patches addressing CVE-2025-32079. In the interim, organizations can implement web application firewall (WAF) rules to detect and block anomalous or malformed HTTP requests targeting GrowthExperiments endpoints. Rate limiting and request throttling can reduce the impact of potential DoS attempts. Disabling or restricting access to the GrowthExperiments feature, if not critical, can serve as a temporary workaround. Additionally, organizations should ensure robust monitoring and alerting on Mediawiki service availability and unusual traffic patterns. Regular backups and incident response plans should be updated to handle potential service disruptions. Finally, educating administrators about this vulnerability and encouraging timely updates once patches are released will be crucial to maintaining resilience.

Description

Improper Input Validation vulnerability in The Wikimedia Foundation Mediawiki - GrowthExperiments allows HTTP DoS.This issue affects Mediawiki - GrowthExperiments: from 1.39 through 1.43.

References

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