Backdrop CMS Bootstrap 5 Lite Theme Cross-Site Scripting Vulnerability

A cross-site scripting (XSS) vulnerability has been identified in the Bootstrap 5 Lite theme for Backdrop CMS, specifically in versions 1.x prior to 1.x-1.0.3. The issue arises because the theme does not adequately sanitize certain class names, allowing for the potential injection of malicious scripts.

Impact

Exploitation of this vulnerability allows for cross-site scripting, where an attacker can inject malicious scripts that are executed in the context of the user's browser.

Remediation

Users are advised to upgrade to the latest version of the Bootstrap 5 Lite theme. The updated version can be downloaded from the Bootstrap 5 Lite 1.0.3 release page on GitHub.