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CVE-2023-38500

By-passing Cross-Site Scripting Protection in HTML Sanitizer

Published: Jul 25, 2023Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-79
NVD MITRE
4.7CVSSMEDIUM
EPSS Score
0.4%
Top 65.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

TYPO3 HTML Sanitizer is an HTML sanitizer, written in PHP, aiming to provide cross-site-scripting-safe markup based on explicitly allowed tags, attributes and values. Starting in version 1.0.0 and prior to versions 1.5.1 and 2.1.2, due to an encoding issue in the serialization layer, malicious markup nested in a `noscript` element was not encoded correctly. `noscript` is disabled in the default configuration, but might have been enabled in custom scenarios. This allows bypassing the cross-site scripting mechanism of TYPO3 HTML Sanitizer. Versions 1.5.1 and 2.1.2 fix the problem.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
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
typo3oss-projectDEWeb & CMS Pluginsaka typo3cms, typo3 cms
packagistpackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

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-59jf-3q9v-rh6g
github.com
https://github.com/TYPO3/html-sanitizer/commit/e3026f589fef0be8c3574ee3f0a0bfbe33d7ebdb
github.com
https://typo3.org/security/advisory/typo3-core-sa-2023-002
typo3.org
and 2 more references View all →

Timeline

Published
Jul 25, 2023
Last Updated
Nov 21, 2024

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