The Chatbot for WordPress by Collect.chat plugin suffers from a stored cross-site scripting vulnerability (CWE-79) due to improper neutralization of input in the '_inpost_head_script[synth_header_script]' post meta field. This allows authenticated users with Contributor or higher privileges to inject malicious scripts into pages, which execute when those pages are accessed by other users. The vulnerability affects all plugin versions up to and including 2.4.8. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, required privileges at the contributor level, no user interaction, and impacts on confidentiality and integrity with no availability impact. No patch or official remediation guidance is currently available from the vendor.

An attacker with Contributor-level access or higher can exploit this vulnerability to inject and store malicious scripts in the WordPress site pages. These scripts execute in the context of users viewing the infected pages, potentially leading to unauthorized actions such as session hijacking or data theft. The impact affects confidentiality and integrity but does not affect availability. There are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Contributor-level access to trusted users only and consider removing or sanitizing input in the '_inpost_head_script[synth_header_script]' post meta field manually. Monitor for updates from Collect.chat and apply patches promptly once available.