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CVE-2022-36020

Bypass of Cross-Site Scripting Protection in typo3/html-sanitizer

Published: Sep 13, 2022Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-79
NVD MITRE
6.1CVSSMEDIUM
EPSS Score
0.6%
Top 55.7%
CISA KEV
Not in KEV
Exploits
3 Known
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

html-sanitizerTYPO3Web & CMS Plugins
html sanitizertypo3Web & CMS Plugins
typo3/html-sanitizerPackagistOSS Libraries
typo3/cms-corePackagistOSS Libraries
typo3/cmsPackagistOSS Libraries
typo3oss-projectDEWeb & CMS Pluginsaka typo3cms, typo3 cms
packagistpackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

3 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-47m6-46mj-p235
github.com
https://github.com/TYPO3/html-sanitizer/commit/60bfdc7f9b394d0236e16ee4cea8372a7defa493
github.com
https://packagist.org/packages/masterminds/html5
packagist.org
and 7 more references View all →

Timeline

Published
Sep 13, 2022
Last Updated
Nov 21, 2024

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