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CVE-2023-38500— By-passing Cross-Site Scripting Protection in HTML Sanitizer

Quick assessment

Affected
TYPO3 html-sanitizer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TYPO3是瑞士TYPO3协会的一套免费开源的内容管理系统(框架)(CMS/CMF)。 TYPO3 HTML Sanitizer存在跨站脚本漏洞，该漏洞源于允许攻击者绕过HTML清理器中的跨站脚本保护。受影响的产品和版本：1.0.0至1.5.1之前版本，2.1.2版本。

CVSS 4.7 · Medium EPSS 0.51% · P41
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I. Basic Information for CVE-2023-38500

Vulnerability Information
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Vulnerability Title
By-passing Cross-Site Scripting Protection in HTML Sanitizer
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
TYPO3 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TYPO3是瑞士TYPO3协会的一套免费开源的内容管理系统(框架)(CMS/CMF)。 TYPO3 HTML Sanitizer存在跨站脚本漏洞，该漏洞源于允许攻击者绕过HTML清理器中的跨站脚本保护。受影响的产品和版本：1.0.0至1.5.1之前版本，2.1.2版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TYPO3 html-sanitizer >= 1.0.0, < 1.5.1 -

II. Public POCs for CVE-2023-38500

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III. Intelligence Information for CVE-2023-38500

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Patches & Fixes for CVE-2023-38500 (1)

Vendor Advisories for CVE-2023-38500 (1)

Other References for CVE-2023-38500 (1)

IV. Related Vulnerabilities

Same product: html-sanitizer
Same vendor: TYPO3
Same weakness: CWE-79

V. Comments for CVE-2023-38500

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