CVE-2026-8981EPSS p3.7%

CVE-2026-8981CVE-2026-8981

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.

Scoring

CVSS 3.5 ()
VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N
EPSS0.14% probability of exploitation · percentile 3.7% · 2026-08-03T12:00:16Z
Last modified2026-07-23

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.