CVE-2022-36020

Name: CVE-2022-36020
Creator: NVD / NIST
Published: 2022-09-13T17:15:08.25+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2022-36020 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The typo3/html-sanitizer package is an HTML sanitizer, written in PHP, aiming to provide XSS-safe markup based on explicitly allowed tags, attributes and values. Due to a parsing issue in the upstream package `masterminds/html5`, malicious markup used in a sequence with special HTML comments cannot be filtered and sanitized. EPSS estimates a 0.63% chance of exploitation in the next 30 days.

Description

The typo3/html-sanitizer package is an HTML sanitizer, written in PHP, aiming to provide XSS-safe markup based on explicitly allowed tags, attributes and values. Due to a parsing issue in the upstream package `masterminds/html5`, malicious markup used in a sequence with special HTML comments cannot be filtered and sanitized. This allows for a bypass of the cross-site scripting mechanism of `typo3/html-sanitizer`. This issue has been addressed in versions 1.0.7 and 2.0.16 of the `typo3/html-sanitizer` package. Users are advised to upgrade. There are no known workarounds for this issue.

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

0.63%

45.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Typo3	Html Sanitizer	>= 1.0.0, < 1.0.7
Typo3	Html Sanitizer	>= 2.0.0, < 2.0.16

References

https://github.com/TYPO3/html-sanitizer/commit/60bfdc7f9b394d0236e16ee4cea8372a7defa493Patch, Third Party Advisory
https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-47m6-46mj-p235Third Party Advisory
https://packagist.org/packages/masterminds/html5Third Party Advisory
https://packagist.org/packages/typo3/html-sanitizerProduct, Third Party Advisory
https://github.com/TYPO3/html-sanitizer/commit/60bfdc7f9b394d0236e16ee4cea8372a7defa493Patch, Third Party Advisory
https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-47m6-46mj-p235Third Party Advisory
https://packagist.org/packages/masterminds/html5Third Party Advisory
https://packagist.org/packages/typo3/html-sanitizerProduct, Third Party Advisory

Timeline

Published: Sep 13, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-36020?

How severe is CVE-2022-36020?

CVE-2022-36020 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2022-36020?

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-2022-36020?

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

Scan your code now

Source: NVD / NIST