CVE-2026-8981 — Lazy Blocks < 4.3.0 - Admin+ Stored XSS via Custom Block Frontend HTML

CVE-2026-8981

Lazy Blocks < 4.3.0 - Admin+ Stored XSS via Custom Block Frontend HTML PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
Unknown / Custom Block Builder	affected 0 before 4.3.0

CWE

No CWE identifiers supplied.

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.