CVE-2022-23499

Description

### Problem Due to a parsing issue in the upstream package [`masterminds/html5`](https://packagist.org/packages/masterminds/html5), malicious markup used in a sequence with special HTML CDATA sections cannot be filtered and sanitized. This allows bypassing the cross-site scripting mechanism of [`typo3/html-sanitizer`](https://packagist.org/packages/typo3/html-sanitizer). Besides that, the upstream package `masterminds/html5` provides HTML raw text elements (`script`, `style`, `noframes`, `noembed` and `iframe`) as DOMText nodes, which were not processed and sanitized further. None of the mentioned elements were defined in the default builder configuration, that's why only custom behaviors, using one of those tag names, were vulnerable to cross-site scripting. ### Solution Update to `typo3/html-sanitizer` versions 1.5.0 or 2.1.1 that fix the problem described.

How to fix CVE-2022-23499

To remediate CVE-2022-23499, upgrade the affected package to a fixed version below.

• —upgrade to 10.4.33 or later
• —upgrade to 1.5.0 or later

Is CVE-2022-23499 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• >= 10.0.0, < 10.4.33
• >= 1.0.0, < 1.5.0

CVSS scores

References (9)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2022-23499
• PATCHgithub.com/TYPO3/html-sanitizer
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2022-23499.yaml
• WEBgithub.com/TYPO3/html-sanitizer/pull/105
• WEB