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Threat Database
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Threat Entry
Updated 2026-06-17
CVE-2026-8981 - Custom Block Builder Plugin
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.
PLUGIN
Custom Block Builder
CVE-2026-8981
Risk Score
Threat Entry
Updated 2025-05-15
CVE-2024-12878 - Custom Block Builder Plugin
The Custom Block Builder WordPress plugin before 3.8.3 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.
PLUGIN
Custom Block Builder
CVE-2024-12878
Risk Score