CVE-2021-45472

Name: CVE-2021-45472
Creator: NVD / NIST
Published: 2021-12-24T02:15:07.35+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.97%

Last modified Jun 17, 2026

CVE-2021-45472 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. In MediaWiki through 1.37, XSS can occur in Wikibase because an external identifier property can have a URL format that includes a $1 formatter substitution marker, and the javascript: URL scheme (among others) can be used.. EPSS estimates a 0.97% chance of exploitation in the next 30 days.

Description

In MediaWiki through 1.37, XSS can occur in Wikibase because an external identifier property can have a URL format that includes a $1 formatter substitution marker, and the javascript: URL scheme (among others) can be used.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.97%

57.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mediawiki	Mediawiki	<= 1.37
Fedoraproject	Fedora	35

References

Timeline

Published: Dec 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45472?

How severe is CVE-2021-45472?

CVE-2021-45472 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.97% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45472?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45472?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST