CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
What the vulnerability does
The Five9 Live Chat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'toolbar' attribute of the [five9-chat] shortcode in all versions up to, and including, 1.1.2. This is due to insufficient input sanitization and output escaping. 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
Five9 Live Chat versions 1.1.2 and earlier 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 authentication can exploit this without user interaction to compromise confidentiality and integrity.
What an attacker can do
Inject malicious scripts that execute in other users' browsers and steal data or modify page content.
Potential impact on your site
Authenticated users can inject scripts affecting other users' sessions, potentially leading to data theft or unauthorized actions.
Conditions required to exploit
Attacker must have a low-level user account; no user interaction required from victims.
Key dates
External resources
