Andrew Farmer

**Name of the Vulnerable Software and Affected Versions** cleanhtml.pl version 1.129 **Description** The issue allows remote attackers to conduct cross-site scripting (XSS) attacks via a "" (backslash) within a "javascript" scheme in a style property, such as "javascript", which bypasses the "javascript" check before the "" is stripped and then rendered in web browsers that allow scripting in style sheets. This occurs when the cleancss option is enabled. **Recommendations** For cleanhtml.pl version 1.129, consider disabling the cleancss option as a temporary workaround to minimize the risk of exploitation.