CVE-2025-32079: Saving the right content to MediaWiki:GrowthMentors.json can take down the site

10.0 CVSS

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.

Classification

CVE ID: CVE-2025-32079

CVSS Base Severity: CRITICAL

CVSS Base Score: 10.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Problem Types

CWE-20 Improper Input Validation

Affected Products

Vendor: The Wikimedia Foundation

Product: Mediawiki - GrowthExperiments

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.1% (probability of being exploited)

EPSS Percentile: 29.05% (scored less or equal to compared to others)

EPSS Date: 2025-04-18 (when was this score calculated)

Stakeholder-Specific Vulnerability Categorization (SSVC)

SSVC Exploitation: none

SSVC Technical Impact: total

SSVC Automatable: true

References

https://nvd.nist.gov/vuln/detail/CVE-2025-32079
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/GrowthExperiments/+/1114020
https://phabricator.wikimedia.org/T384244

Timeline