The Chatroll Live Chat WordPress plugin versions up to 2.5.0 contain a stored cross-site scripting vulnerability (CWE-79) due to improper neutralization of input during web page generation. Specifically, the plugin's 'chatroll' shortcode does not adequately sanitize or escape user-supplied attributes, allowing authenticated users with contributor-level access or higher to inject arbitrary JavaScript code. This code executes in the context of any user who views the injected page, potentially leading to session hijacking or other script-based attacks. The vulnerability is network exploitable with low attack complexity and no user interaction required beyond authentication. Confidentiality and integrity impacts are low, with no availability impact reported. No known exploits in the wild have been reported, and no patch or official fix is currently documented.

An authenticated attacker with contributor-level or higher privileges can inject persistent malicious scripts into pages via the 'chatroll' shortcode. These scripts execute in the browsers of users who access the compromised pages, potentially allowing theft of session tokens, defacement, or other client-side attacks. The CVSS score of 6.4 reflects a medium severity with low confidentiality and integrity impacts and no availability impact. There are no known active exploits reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level access to trusted users only and consider disabling or removing the Chatroll Live Chat plugin if possible to prevent exploitation.