Security Advisory

CVE-2026-8981

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-09 06:00:09

Last updated 2026-06-09 10:32:50

Assigner WPScan

CVSS score not scored

State PUBLISHED

Description

The Custom Block Builder WordPress plugin before 4.3.0 does not consistently check the unfiltered_html capability across all paths that write to its block template code fields, allowing administrators on multisite installations (or single-site installs with DISALLOW_UNFILTERED_HTML defined) to inject arbitrary JavaScript that executes for any visitor of pages embedding the affected block.

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