What the vulnerability does
01Description
The Chat Support for Viber – Chat Bubble and Chat Button for Gutenberg, Elementor and Shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'vchat' shortcode in all versions up to, and including, 1.7.3 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
A cross-site scripting (XSS) vulnerability in Chat Support for Viber allows authenticated users to inject malicious scripts that execute in other users' browsers. The vulnerability affects versions up to 1.7.3 and can impact site integrity and confidentiality. Users should update to a version newer than 1.7.3 when available.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers, potentially stealing data or modifying site content.
Potential impact on your site
04Site Impact
Other site users may have their sessions compromised or see malicious content injected into pages they visit.
Conditions required to exploit
05Prerequisites
Attacker must have a user account with low-level privileges (e.g., subscriber or contributor role).
Key dates
06Disclosure timeline
January 7, 2025
CVE published
April 8, 2026
Record updated
