typo3/html-sanitizer · Security
By-passing Cross-Site Scripting Protection in HTML Sanitizer
- GHSA ID
- GHSA-59jf-3q9v-rh6g
- CVE ID
- CVE-2023-38500
- Severity
- medium
- Published
- Updated
- CVSS
- 4.7 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
- CVSS v3
- 4.7 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Description
CVSS:
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C(4.4)
Problem
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.
Solution
Update to typo3/html-sanitizer versions 1.5.1 or 2.1.2 that fix the problem described.
Credits
Thanks to David Klein and Yaniv Nizry who reported this issue, and to TYPO3 security team members Oliver Hader and Benjamin Franzke who fixed the issue.
References
CWEs
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-59jf-3q9v-rh6g ↗
- https://nvd.nist.gov/vuln/detail/CVE-2023-38500 ↗
- https://github.com/TYPO3/html-sanitizer/commit/e3026f589fef0be8c3574ee3f0a0bfbe33d7ebdb ↗
- https://typo3.org/security/advisory/typo3-core-sa-2023-002 ↗
- https://github.com/advisories/GHSA-59jf-3q9v-rh6g ↗