CVE-2021-42047

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.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 1.50% Top 20%
Vendor Advisory wikimedia.org Vendor Advisory wikimedia.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://phabricator.wikimedia.org/T289063 patch vendor advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/GrowthExperiments/+/720088 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-42047?
CVE-2021-42047 has been scored as a medium severity vulnerability.
How to fix CVE-2021-42047?
To fix CVE-2021-42047, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-42047 being actively exploited in the wild?
It is possible that CVE-2021-42047 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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