Fluid Attacks Database

Description

TYPO3 HTML Sanitizer Bypasses Cross-Site Scripting Protection

Meta

CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C (5.7)

Problem

Due to a parsing issue in upstream package masterminds/html5, malicious markup used in a sequence with special HTML comments cannot be filtered and sanitized. This allows to by-pass the cross-site scripting mechanism of typo3/html-sanitizer.

Solution

Update to typo3/html-sanitizer versions 1.0.7 or 2.0.16 that fix the problem described.

Credits

Thanks to David Klein who reported this issue, and to TYPO3 security team member Oliver Hader who fixed the issue.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Package	Affected version	Patched versions
packagist	typo3/cms-core	>=10.0.0 <10.4.32 \|\| >=11.0.0 <11.5.16	10.4.32, 11.5.16
packagist	typo3/cms	>=10.0.0 <10.4.32 \|\| >=11.0.0 <11.5.16	10.4.32, 11.5.16
packagist	typo3/html-sanitizer	>=1.0.0 <1.0.7 \|\| >=2.0.0 <2.0.16	1.0.7, 2.0.16

Aliases

1. CVE-2022-360202. NVD-2022-360203. OSV-2022-360204. GHSA-47m6-46mj-p2355. GCVE-2022-36020

References

1. https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-47m6-46mj-p2352. https://github.com/TYPO3/html-sanitizer/commit/60bfdc7f9b394d0236e16ee4cea8372a7defa4933. https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2022-36020.yaml4. https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2022-36020.yaml5. https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/html-sanitizer/CVE-2022-36020.yaml6. https://packagist.org/packages/masterminds/html57. https://packagist.org/packages/typo3/html-sanitizer8. https://typo3.org/security/advisory/typo3-core-sa-2022-011