Answer in brief
CVE-2026-16557 records a Medium severity (CVSS 4.3) vulnerability in Nimble Builder <= 3.3.8 - Subscriber+ Non-Public Content Disclosure via sek_get_nimble_content_for_seo_plugins. The current sources do not mark it as known exploited. The current feed maps Unknown/Nimble Page Builder (generic), Unknown/Nimble Page Builder (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 4.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Unknown/Nimble Page Builder (generic), Unknown/Nimble Page Builder (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Unknown/Nimble Page Buildergeneric | >=0 <=3.3.8 | Not reported |
| Unknown/Nimble Page Buildergeneric | 0 | Not reported |
Published upstream
Sep 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.