Vulnerability 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.
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/commit/60bfdc7f9b394d0236e16ee4cea8372a7PatchThird Party Advisory
- https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-47m6-46mj-p235Third Party Advisory
- https://packagist.org/packages/masterminds/html5Third Party Advisory
- https://packagist.org/packages/typo3/html-sanitizerProductThird Party Advisory
- https://github.com/TYPO3/html-sanitizer/commit/60bfdc7f9b394d0236e16ee4cea8372a7PatchThird Party Advisory
- https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-47m6-46mj-p235Third Party Advisory
- https://packagist.org/packages/masterminds/html5Third Party Advisory
- https://packagist.org/packages/typo3/html-sanitizerProductThird Party Advisory
FAQ
What is CVE-2022-36020?
CVE-2022-36020 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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...
How severe is CVE-2022-36020?
CVE-2022-36020 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-2022-36020?
Check the references section above for vendor advisories and patch information. Affected products include: Typo3 Html Sanitizer.