CVE-2026-16269

Newsletters < 4.16 - Unauthenticated API Authentication Bypass via Type Juggling

Published Aug 8, 2026 CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions newsletters
Vendors & Products Wordpress-extensions
Wordpress-extensions newsletters
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-287
Type Values Removed Values 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.
Title Newsletters < 4.16 - Unauthenticated API Authentication Bypass via Type Juggling
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Aug 11, 2026, 7:33 PM
Reserved
Jul 20, 2026, 9:09 AM
Status
Deferred
Published
Aug 8, 2026, 7:17 AM
Modified
Aug 26, 2026, 4:31 PM