CVE-2026-8981

3.5 lowEPSS 0.1%

Low (3.5). EPSS 0.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

3.5 low

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-06-09
Modified: 2026-07-23
Record from: the NVD, synced 2026-10-19

References

https://wpscan.com/vulnerability/9815b0e6-e411-4a5c-9c63-30bad21da698/

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