low3.5
CVE-2026-8981
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 temp…
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| Custom Block Builder WordPress Plugin | before 4.3.0 |
Versions were read from the advisory text. No structured product data has been published for this record yet.