CVE-2021-29272

Description

bluemonday before 1.0.5 allows XSS because certain Go lowercasing converts an uppercase Cyrillic character, defeating a protection mechanism against the "script" string.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.33%
Third-Party Advisory github.com Third-Party Advisory ryotak.me
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/microcosm-cc/bluemonday/releases/tag/v1.0.5 third party advisory
https://vuln.ryotak.me/advisories/4 third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-29272?
CVE-2021-29272 has been scored as a medium severity vulnerability.
How to fix CVE-2021-29272?
To fix CVE-2021-29272, 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-2021-29272 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-29272 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.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.