CVE-2023-38500CWE-79

By-passing Cross-Site Scripting Protection in HTML Sanitizer

Medium · published July 25, 2023

CVSS v3.1
4.7
EPSS
1%
Percentile
42.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.7 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00508 · 42.5th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2023-07-25T20:59Z
EPSS history
Timeline
  • 25 JUL 20:59Z
    By-passing Cross-Site Scripting Protection in HTML Sanitizer
    cvelistv5