CVE-2022-23499: 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…

PriorityP425medium6.1CVSS 3.1

AVNACLPRNUIRSCCLILAN

EPSS

0.44%

35.0th percentile

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.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
typo3	cms	>= 10.0.0 < 10.4.33	10.4.33
typo3	cms	>= 11.0.0 < 11.5.20	11.5.20
typo3	cms	>= 12.0.0 < 12.1.1	12.1.1
typo3	html-sanitizer	—	—
typo3	html-sanitizer	—	—
typo3	html-sanitizer	>= 1.0.0 < 1.5.0	1.5.0
typo3	html-sanitizer	>= 2.0.0 < 2.1.1	2.1.1
typo3	html_sanitizer	1.0.0 – 1.0.7	—
typo3	html_sanitizer	>= 2.0.0 < 2.1.1	2.1.1

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.