Information disclosure in Nimble Page Builder

CVE-2026-16557

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.

Vulnerability class: Information Disclosure

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (22.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-16557: held from 0.002 to 0.003.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

  • Nimble Page Builder

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16557?
CVE-2026-16557 is a medium-severity vulnerability in Nimble Page Builder, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-09-19.
How severe is CVE-2026-16557?
Medium severity. CVSS v3 base score is 4.3 out of 10.