CVE-2022-36020

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in packagist/typo3/html-sanitizer

Identifiers

CVE-2022-36020, GHSA-47m6-46mj-p235

Package Slug

packagist/typo3/html-sanitizer

Vulnerability

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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.

Affected Versions

All versions starting from 1.0.0 before 1.0.7, all versions starting from 2.0.0 before 2.0.16

Solution

Upgrade to versions 1.0.7, 2.0.16 or above.

Last Modified

2022-09-19

source