The Starter Templates – AI-Powered Templates for Elementor & Gutenberg WordPress plugin is vulnerable to stored cross-site scripting due to improper neutralization of input in the 'custom_upload_mimes' function. This allows authenticated users with contributor or higher privileges to inject arbitrary web scripts into pages. These scripts execute in the context of users viewing the compromised pages, potentially leading to information disclosure or session hijacking. The vulnerability affects versions up to 4.2.0 and is classified under CWE-79. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, low privileges required, no user interaction, and impact on confidentiality and integrity but not availability.

An attacker with contributor-level or higher permissions can exploit this vulnerability to inject malicious scripts that execute in the browsers of users who visit the infected pages. This can lead to unauthorized actions such as theft of sensitive information or session tokens. 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 permissions carefully and monitor for suspicious activity. Avoid granting contributor or higher roles to untrusted users. Review and sanitize any user-generated content related to the 'custom_upload_mimes' function if possible.