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

2020-11-1720:45:20

CWE-79

GitHub_M

www.cve.org

typo3 fluid

cross-site scripting

vulnerable

cve-2020-26216

tagbasedviewhelper

viewhelpers

abstractconditionviewhelper

update.

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

8.1

Confidence

High

EPSS

0.001

Percentile

50.1%

JSON

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.

CNA Affected

[
  {
    "product": "Fluid",
    "vendor": "TYPO3",
    "versions": [
      {
        "status": "affected",
        "version": ">= 2.0.0, < 2.0.8"
      },
      {
        "status": "affected",
        "version": ">= 2.1.0, < 2.1.7"
      },
      {
        "status": "affected",
        "version": ">= 2.2.0, < 2.2.4"
      },
      {
        "status": "affected",
        "version": ">= 2.3.0, < 2.3.7"
      },
      {
        "status": "affected",
        "version": ">= 2.4.0, < 2.4.4"
      },
      {
        "status": "affected",
        "version": ">= 2.5.0, < 2.5.11"
      },
      {
        "status": "affected",
        "version": ">= 2.6.0, < 2.6.10"
      }
    ]
  }
]