What the vulnerability does
01Description
The Smartsupp – live chat, AI shopping assistant and chatbots plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'code' parameter in all versions up to, and including, 3.9.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Subscriber-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
Smartsupp versions up to 3.9.1 contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts affecting other users. The vulnerability has a changed scope, meaning the impact extends beyond the vulnerable component itself. An attacker with low-level account access can craft malicious input that executes in other users' browsers, potentially compromising their sessions or data.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers, potentially stealing session data or performing actions on their behalf.
Potential impact on your site
04Site Impact
Users of your Smartsupp chat widget may have their sessions compromised or be redirected to malicious sites by attackers with basic account access.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the Smartsupp service; no user interaction required from victims.
Key dates
06Disclosure timeline
February 19, 2026
CVE published
April 8, 2026
Record updated