CVE-2021-31550

Description

An issue was discovered in the CommentBox extension for MediaWiki through 1.35.2. Via crafted configuration variables, a malicious actor could introduce XSS payloads into various layers.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.27%
Vendor Advisory wikimedia.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://phabricator.wikimedia.org/T270767 third party advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Commentbox/+/651934/ vendor advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2021-31550?
CVE-2021-31550 has been scored as a medium severity vulnerability.
How to fix CVE-2021-31550?
To fix CVE-2021-31550, 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-2021-31550 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-31550 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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