TYPO3 HTML Sanitizer up to 1.5.0/2.1.1 and cross site scripting

Summaryinfo

A vulnerability labeled as problematic has been found in TYPO3 HTML Sanitizer up to 1.5.0/2.1.1. The affected element is an unknown function. Such manipulation of the argument and leads to cross site scripting. This vulnerability is documented as CVE-2023-38500. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in TYPO3 HTML Sanitizer up to 1.5.0/2.1.1 (Content Management System). Affected by this issue is an unknown part. The manipulation of the argument and with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

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.

The weakness was released 07/26/2023 as GHSA-59jf-3q9v-rh6g. The advisory is available at github.com. This vulnerability is handled as CVE-2023-38500 since 07/18/2023. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 1.5.1 or 2.1.2 eliminates this vulnerability. Applying the patch e3026f589fef0be8c3574ee3f0a0bfbe33d7ebdb is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Content Management System

Name

• TYPO3 HTML Sanitizer

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5.0
• 2.1.0
• 2.1.1

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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