The Qi Blocks plugin for WordPress suffers from a stored cross-site scripting vulnerability due to improper neutralization of input during web page generation. Specifically, the plugin's file uploader does not adequately sanitize or escape input, enabling authenticated users with Author-level privileges or above to inject arbitrary web scripts. These scripts persist in the affected pages and execute in the context of users who access those pages, potentially leading to session hijacking or other script-based attacks. The vulnerability affects all versions up to and including 1.2.9. There is no vendor advisory or patch information available at this time.

An attacker with Author-level access or higher can exploit this vulnerability to inject malicious scripts that execute in the browsers of users viewing the compromised pages. This can lead to information disclosure or session hijacking. The vulnerability does not impact availability. The CVSS score of 6.4 reflects a medium severity with network attack vector, low attack complexity, and no user interaction required.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Author-level access to trusted users only and consider disabling or limiting the use of the file uploader in Qi Blocks. Monitor for plugin updates from qodeinteractive and apply them promptly once released.