CVE-2026-16557 Nimble Builder <= 3.3.8 - Subscriber+ Non-Public Content Disclosure via sek_get_nimble_content_for_seo_plugins
Authenticated users can access non-public page-builder content due to missing authorization checks in the Nimble Page Builder WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16557?
CVE-2026-16557 is a medium-severity missing authorization vulnerability in Unknown Nimble Page Builder, published on 19 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-200
Which versions are affected by CVE-2026-16557?
How do I fix CVE-2026-16557?
No fix has been published for CVE-2026-16557 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-16557 being exploited?
There is no known exploitation of CVE-2026-16557 in the wild and no public exploit code.
Sources
Also known as GHSA-4c39-75m8-74f3.