CVE-2020-27620

Description

The Cosmos Skin for MediaWiki through 1.35.0 has stored XSS because MediaWiki messages were not being properly escaped. This is related to wfMessage and Html::rawElement, as demonstrated by CosmosSocialProfile::getUserGroups.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.53%
Vendor Advisory wikimedia.org 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/T265440 vendor advisory
https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634749 vendor advisory
https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634752 vendor advisory
https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634751 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-27620?
CVE-2020-27620 has been scored as a medium severity vulnerability.
How to fix CVE-2020-27620?
To fix CVE-2020-27620, 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-2020-27620 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-27620 is being actively exploited. 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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