Live Composer WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Live Composer – Free WordPress Website Builder plugin, affecting all versions through 2.0.2. This vulnerability arises from inadequate input sanitization and output escaping on user-supplied attributes, allowing authenticated attackers with Contributor-level access or higher to inject arbitrary scripts. These scripts are executed when a user accesses the compromised page.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the page.

Reproduction

To reproduce this vulnerability, an authenticated user with Contributor-level access can inject scripts into user-supplied attributes that are not properly sanitized or escaped. Once injected, these scripts will be executed when the page is accessed by any user.

Remediation

Users are advised to update the Live Composer – Free WordPress Website Builder plugin to version 2.0.3 or a newer patched version.