This vulnerability involves improper neutralization of input in the Custom Query Blocks plugin by Ronald Huereca, leading to DOM-based Cross-site Scripting (XSS) in the post-type-archive-mapping component. The affected versions are from initial releases through 5.5.0. The CVSS v3.1 base score is 6.5, indicating a medium severity with network attack vector, low attack complexity, requiring low privileges and user interaction, and impacts confidentiality, integrity, and availability to a limited extent. No official remediation or patch has been documented in the available data.

Successful exploitation could allow an attacker with low privileges and requiring user interaction to execute arbitrary scripts in the context of the affected web application, potentially leading to limited confidentiality, integrity, and availability impacts. However, no known exploits have been reported in the wild to date.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with this plugin and consider disabling or restricting its use in environments where XSS risks are critical.