CVE-2021-42047

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-09-29 · updated 2026-06-17
Weakness: CWE-79

Description

An issue was discovered in the Growth extension in MediaWiki through 1.36.2. On any Wiki with the Mentor Dashboard feature enabled, users can login with a mentor account and trigger an XSS payload (such as alert) via Growthexperiments-mentor-dashboard-mentee-overview-no-js-fallback.

Affected products

Wikimedia Foundation MediaWiki: through 1.36.2

References

https://gerrit.wikimedia.org/r/c/mediawiki/extensions/GrowthExperiments/+/720088
https://phabricator.wikimedia.org/T289063
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/GrowthExperiments/+/720088
https://phabricator.wikimedia.org/T289063

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