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CVE-2020-26216— Cross-Site Scripting in TYPO3 Fluid

Quick assessment

Affected
TYPO3 Fluid
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 Fluid 存在跨站脚本漏洞，该漏洞源于TagBasedViewHelper允许XSS通过恶意创建的additionalAttributes数组，方法是创建带有属性结束引号和HTML的键。在呈现这些属性时，TagBuilder不会转义；使用CompileWithContentArgumentAndRenderStatic trait并声明escapeOutput = false的ViewHelpers将收到

CVSS 8.0 · High EPSS 1.04% · P64
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I. Basic Information for CVE-2020-26216

Vulnerability Information
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Vulnerability Title
Cross-Site Scripting in TYPO3 Fluid
Source: CVE Program / CVE List V5
Vulnerability Description
TYPO3 Fluid before versions 2.0.8, 2.1.7, 2.2.4, 2.3.7, 2.4.4, 2.5.11 and 2.6.10 is vulnerable to Cross-Site Scripting. Three XSS vulnerabilities have been detected in Fluid: 1. TagBasedViewHelper allowed XSS through maliciously crafted additionalAttributes arrays by creating keys with attribute-closing quotes followed by HTML. When rendering such attributes, TagBuilder would not escape the keys. 2. ViewHelpers which used the CompileWithContentArgumentAndRenderStatic trait, and which declared escapeOutput = false, would receive the content argument in unescaped format. 3. Subclasses of AbstractConditionViewHelper would receive the then and else arguments in unescaped format. Update to versions 2.0.8, 2.1.7, 2.2.4, 2.3.7, 2.4.4, 2.5.11 or 2.6.10 of this typo3fluid/fluid package that fix the problem described. More details are available in the linked advisory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/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 Fluid 存在跨站脚本漏洞，该漏洞源于TagBasedViewHelper允许XSS通过恶意创建的additionalAttributes数组，方法是创建带有属性结束引号和HTML的键。在呈现这些属性时，TagBuilder不会转义；使用CompileWithContentArgumentAndRenderStatic trait并声明escapeOutput = false的ViewHelpers将收到
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 Fluid >= 2.0.0, < 2.0.8 -

II. Public POCs for CVE-2020-26216

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III. Intelligence Information for CVE-2020-26216

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Patches & Fixes for CVE-2020-26216 (1)

Vendor Advisories for CVE-2020-26216 (1)

Other References for CVE-2020-26216 (1)

IV. Related Vulnerabilities

Same product: Fluid
Same vendor: TYPO3
Same weakness: CWE-79

V. Comments for CVE-2020-26216

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