What’s Vulnerable › Vulnerabilities

CVE-2025-62667: Stored XSS through article extracts in GrowthExperiments

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-18 · updated 2026-10-09
• Weakness: CWE-79

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - GrowthExperiments Extension allows Stored XSS.This issue affects Mediawiki - GrowthExperiments Extension: from master before 1.39.

Affected products

• The Wikimedia Foundation Mediawiki - GrowthExperiments Extension: from master before 1.39 — fixed in 1.39

How to fix

Upgrade to a fixed version: The Wikimedia Foundation Mediawiki - GrowthExperiments Extension 1.39. Check the vendor advisory for mitigations.

References

• https://gerrit.wikimedia.org/r/q/Iafd0acccf9a5c20d9e955d7bc3de1304968401ec
• https://phabricator.wikimedia.org/T402698

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