CVE-2025-49929: Ultimate Blocks

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Ultimate Blocks Ultimate Blocks ultimate-blocks allows Stored XSS.This issue affects Ultimate Blocks: from n/a through <= 3.3.6.

Affected products

• Ultimate Blocks Ultimate Blocks: up to and including 3.3.6

Published 2025-10-22. Last modified 2026-06-17.