CVE-2021-42046

Description

An issue was discovered in the GlobalWatchlist extension in MediaWiki through 1.36.2. The rev-deleted-user and ntimes messages were not properly escaped and allowed for users to inject HTML and JavaScript.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 1.29% Top 25%
Vendor Advisory wikimedia.org Vendor Advisory wikimedia.org Vendor Advisory wikimedia.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://phabricator.wikimedia.org/T286385 vendor advisory
https://gerrit.wikimedia.org/r/q/Ib7f9b009730fe0df283cec1169f84c7a83a58b1d patch vendor advisory
https://gerrit.wikimedia.org/r/q/Id2204fb5afe591d63764466de35ac0aaa5999983 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-42046?
CVE-2021-42046 has been scored as a medium severity vulnerability.
How to fix CVE-2021-42046?
To fix CVE-2021-42046, 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-2021-42046 being actively exploited in the wild?
It is possible that CVE-2021-42046 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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