Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Typo3 | Html Sanitizer | >= 1.0.0, <= 1.0.7 |
Related Weaknesses (CWE)
References
- https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-hvwx-qh2h-xcfjThird Party Advisory
- https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-hvwx-qh2h-xcfjThird Party Advisory
FAQ
What is CVE-2022-23499?
CVE-2022-23499 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 w...
How severe is CVE-2022-23499?
CVE-2022-23499 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-23499?
Check the references section above for vendor advisories and patch information. Affected products include: Typo3 Html Sanitizer.