CVE-2026-108168: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in DLX Plugins Custom Query Blocks

This vulnerability in DLX Plugins Custom Query Blocks (versions >=0 <5.7.0) allows an attacker to inject malicious scripts that are stored and later executed in the context of users viewing affected pages. The root cause is improper neutralization of input during web page generation in the post-type-archive-mapping feature, resulting in stored cross-site scripting (XSS). The CVSS 3.1 vector indicates network attack vector, low attack complexity, requiring low privileges and user interaction, with a scope change and partial impact on confidentiality, integrity, and availability.

Successful exploitation of this stored XSS vulnerability can allow attackers to execute arbitrary scripts in the context of users visiting the affected web pages. This can lead to theft of sensitive information, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability of the affected system or user data.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, consider restricting user input or applying web application firewall rules to detect and block malicious payloads related to this vulnerability.