Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Unknown Newsletters — Newsletters < 4.16 - Unauthenticated API Authentication Bypass via Type Juggling
AV AC PR UI S C I A CVSS EPSS %ile KEV
N H N N U N L L 4.8 .0023 13.6 —
AFFECTED
Product Versions Fixed
Newsletters unspecified —
TIMELINE
Jul 20 Reserved by WPScan
Aug 8 Published (CNA: WPScan)
Aug 10 EXPLOIT PUBLISHED — CVE-2026-16269 (Unknown Newsletters). Public exploit reference added.
Description
The Newsletters WordPress plugin before 4.16 does not strictly compare its API authentication key, allowing unauthenticated attackers to bypass the API authentication via type juggling and perform privileged actions such as modifying subscriber records and sending emails, when the optional API has been enabled.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| July 20, 2026 | Reserved | Reserved by WPScan |
| August 8, 2026 | Published | Published (CNA: WPScan) |
| August 10, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-16269 (Unknown Newsletters). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Unknown | Newsletters | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-16269 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.