Chat Support for Viber Stored Cross-Site Scripting Vulnerability in WordPress Plugin

A stored cross-site scripting vulnerability has been identified in the Chat Support for Viber WordPress plugin, specifically in the Chat Bubble and Chat Button features for Gutenberg, Elementor, and Shortcode. This vulnerability exists in all versions through 1.7.3 and is due to inadequate input sanitization and output escaping of user-supplied attributes in the plugin's 'vchat' shortcode. As a result, authenticated attackers with contributor-level access or higher can inject arbitrary web scripts into pages, which will execute when users access the affected pages.

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.

Remediation

Users can update to version 1.7.4 or a newer patched version to address this vulnerability.