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

2023-07-2520:59:53

CWE-79

GitHub_M

www.cve.org

cve-2023-38500

html sanitizer

cross-site scripting

encoding issue

serialization layer

noscript element

bypassing mechanism

version 1.0.0

version 1.5.1

version 2.1.2

4.7 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

33.7%

JSON

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.

CNA Affected

[
  {
    "vendor": "TYPO3",
    "product": "html-sanitizer",
    "versions": [
      {
        "version": ">= 1.0.0, < 1.5.1",
        "status": "affected"
      },
      {
        "version": ">= 2.0.0, < 2.1.2",
        "status": "affected"
      }
    ]
  }
]