CVE-2026-78290: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ThemeGrill Magazine Blocks

This vulnerability (CVE-2026-78290) is classified as CWE-79, indicating improper neutralization of input during web page generation, commonly known as cross-site scripting (XSS). It affects the ThemeGrill Magazine Blocks plugin for WordPress, specifically versions up to 1.8.6. The flaw allows an attacker with contributor-level privileges to inject malicious scripts, potentially impacting confidentiality, integrity, and availability as reflected in the CVSS vector. No vendor advisory or patch information is provided.

Successful exploitation could allow an attacker with contributor privileges to execute arbitrary scripts in the context of the affected web application, potentially leading to partial confidentiality, integrity, and availability impacts. The CVSS vector indicates network attack vector, low attack complexity, required privileges at the contributor level, user interaction required, and scope change, with low confidentiality and integrity impact and low availability impact.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor privileges and monitor for suspicious activity related to the Magazine Blocks plugin. Avoid exposing untrusted input in web pages without proper sanitization.