CVE-2026-16557: Unknown Nimble Page Builder

Medium severity, CVSS 4.3. EPSS: 0.2% chance of exploitation in the next 30 days.

The Nimble Page Builder WordPress plugin through 3.3.8 does not perform an authorization check when returning page-builder content through an authenticated AJAX action, allowing any authenticated user (Subscriber+) to disclose the page-builder content of arbitrary non-public (draft, pending, private, scheduled) posts and pages.

Affected products

• Unknown Nimble Page Builder: up to and including 3.3.8

Published 2026-09-19. Last modified 2026-09-21.