CVE-2021-30458

Description

An issue was discovered in Wikimedia Parsoid before 0.11.1 and 0.12.x before 0.12.2. An attacker can send crafted wikitext that Utils/WTUtils.php will transform by using a <meta> tag, bypassing sanitization steps, and potentially allowing for XSS.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.21%
Vendor Advisory gentoo.org Vendor Advisory wikimedia.org Vendor Advisory mediawiki.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://phabricator.wikimedia.org/T279451 issue tracking vendor advisory
https://www.mediawiki.org/wiki/Parsoid vendor advisory
https://security.gentoo.org/glsa/202107-40 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-30458?
CVE-2021-30458 has been scored as a medium severity vulnerability.
How to fix CVE-2021-30458?
To fix CVE-2021-30458, 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-2021-30458 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-30458 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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