CVE-2023-38500 - CVE House

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Status published Medium CVE-2023-38500

By-passing Cross-Site Scripting Protection in HTML Sanitizer

4.7 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from TYPO3

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Command Injection in extension "TYPO3 Backup Plus" (ns_backup)

Insecure Direct Object Reference in extension "femanager" (femanager)

Insecure Direct Object Reference in extension "powermail" (powermail)

TYPO3 CMS Allows Broken Access Control in Recycler Module

TYPO3 CMS Allows Broken Access Control in Redirects Module

Affected Vendor

TYPO3

View all reports →

Affected Software

html-sanitizer

Vulnerable Versions:

>= 1.0.0, < 1.5.1, >= 2.0.0, < 2.1.2

Timeline

Official Publish: July 25th, 2023

Last Modified: October 10th, 2024

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1189 Drive-by Compromise

T1059.007 JavaScript

T1539 Steal Web Session Cookie

T1213 Data from Information Repositories

T1567 Exfiltration Over Web Service

T1491.001 Defacement