Possible XSS injection through Validate::isCleanHTML method
Date: 2023-04
Affected: composer/prestashop/prestashop, composer/prestashop/prestashop
Attack vector: xss
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2023-30838
CWE: CWE-79
CVSS: 8 (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H)

### Impact ValidateCore::isCleanHTML() method of Prestashop misses hijickable events which can lead to XSS injection, allowed by the presence of pre-setup @keyframes methods. This XSS which hijacks HTML attributes will be triggered without any interaction of the visitor/administrator which makes it as dangerous as a trivial XSS. Contrary to most XSS which target HTML attributes and which are triggered without user interaction (such as onload / onerror which suffer from a very limited scope), this one can hijack every HTML element, which increases the danger due to a complete HTML elements scope. ### Patches The patch will be on PS 8.0.4 and PS 1.7.8.9 ### References


Mitigations:

Architectural layers (MAESTRO):