HTML sanitizer is written in PHP, aiming to provide XSS-safe markup based on explicitly allowed tags, attributes and values. In versions prior to 1.5.0 or 2.1.1, malicious markup used in a sequence with special HTML CDATA sections cannot be filtered and sanitized due to a parsing issue in the upstream package masterminds/html5. This allows bypassing the cross-site scripting mechanism of typo3/html-sanitizer. 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. This issue has been fixed in versions 1.5.0 and 2.1.1.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2022-12-13T20:29:41.025Z

Updated: 2024-08-03T03:43:46.006Z

Reserved: 2022-01-19T21:23:53.768Z

Link: CVE-2022-23499

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-12-13T21:15:11.207

Modified: 2023-11-07T03:44:11.133

Link: CVE-2022-23499

cve-icon Redhat

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