CVE-2021-42048

Description

An issue was discovered in the Growth extension in MediaWiki through 1.36.2. Any admin can add arbitrary JavaScript code to the Newcomer home page footer, which can be executed by viewers with zero edits.

Category

4.8
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 1.15% Top 25%
Vendor Advisory wikimedia.org Vendor Advisory wikimedia.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://phabricator.wikimedia.org/T289064 patch vendor advisory
https://gerrit.wikimedia.org/r/q/Iaa90a8976834d70caad592e9d1b18510318db537 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-42048?
CVE-2021-42048 has been scored as a medium severity vulnerability.
How to fix CVE-2021-42048?
To fix CVE-2021-42048, 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-2021-42048 being actively exploited in the wild?
It is possible that CVE-2021-42048 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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