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OpenAdvisories
Medium · 4.8 CVE-2026-16269 EUVD-2026-54730GHSA-5mfh-c59g-8688

Newsletters < 4.16 - Unauthenticated API Authentication Bypass via Type Juggling

Published Aug 8, 2026 · Updated Aug 11, 2026 · Assigned by WPScan

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.

Affected products

VendorProductAffectedFixed
— Newsletters < 4.16 4.16

References