Vulnerability Name:

CVE-2020-26216 (CCN-191886)

Assigned:2020-11-17
Published:2020-11-17
Updated:2020-12-02
Summary: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.
CVSS v3 Severity:6.1 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:H/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
6.1 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:H/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.5 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-79
Vulnerability Consequences:Cross-Site Scripting
References:Source: MITRE
Type: CNA
CVE-2020-26216

Source: XF
Type: UNKNOWN
typo3-cve202026216-xss(191886)

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/TYPO3/Fluid/commit/f20db4e74cf9803c6cffca2ed2f03e1b0b89d0dc

Source: CONFIRM
Type: Exploit, Third Party Advisory
https://github.com/TYPO3/Fluid/security/advisories/GHSA-hpjm-3ww5-6cpf

Source: CCN
Type: TYPO3-CORE-SA-2020-009
Cross-Site Scripting through Fluid view helper arguments

Source: MISC
Type: Exploit, Vendor Advisory
https://typo3.org/security/advisory/typo3-core-sa-2020-009

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2020-26216

Vulnerable Configuration:Configuration 1:
  • cpe:/a:typo3:fluid:*:*:*:*:*:*:*:* (Version < 2.0.8)
  • OR cpe:/a:typo3:fluid:*:*:*:*:*:*:*:* (Version >= 2.1.0 and < 2.1.7)
  • OR cpe:/a:typo3:fluid:*:*:*:*:*:*:*:* (Version >= 2.2.0 and < 2.2.4)
  • OR cpe:/a:typo3:fluid:*:*:*:*:*:*:*:* (Version >= 2.3.0 and < 2.3.7)
  • OR cpe:/a:typo3:fluid:*:*:*:*:*:*:*:* (Version >= 2.4.0 and < 2.4.4)
  • OR cpe:/a:typo3:fluid:*:*:*:*:*:*:*:* (Version >= 2.5.0 and < 2.5.11)
  • OR cpe:/a:typo3:fluid:*:*:*:*:*:*:*:* (Version >= 2.6.0 and < 2.6.10)

    • * Denotes that component is vulnerable
    BACK
    typo3 fluid *
    typo3 fluid *
    typo3 fluid *
    typo3 fluid *
    typo3 fluid *
    typo3 fluid *
    typo3 fluid *