If the CMS does not filter onmouseover but allows data-bs-* attributes, the XSS bypasses naive filters.

Use Subresource Integrity (SRI) hashes. Example for 5.1.3:

Many content management systems (CMS) allow editors to insert HTML. An attacker could inject:

Bootstrap 5.1.3 Exploit Guide

If the CMS does not filter onmouseover but allows data-bs-* attributes, the XSS bypasses naive filters.

Use Subresource Integrity (SRI) hashes. Example for 5.1.3: bootstrap 5.1.3 exploit

Many content management systems (CMS) allow editors to insert HTML. An attacker could inject: If the CMS does not filter onmouseover but