CVE-2025-62701: Stored XSS through system messages

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: 2025-10-21 · updated 2026-10-08
Weakness: CWE-79

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - Wikistories allows Stored XSS.This issue affects Mediawiki - Wikistories: from master before 1.44.

Affected products

The Wikimedia Foundation Mediawiki - Wikistories: from master before 1.44 — fixed in 1.44

How to fix

Upgrade to a fixed version: The Wikimedia Foundation Mediawiki - Wikistories 1.44. Check the vendor advisory for mitigations.

References

https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Wikistories/+/1189218
https://phabricator.wikimedia.org/T400545
https://phabricator.wikimedia.org/T400545

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