Vulnerability · Published Aug 8, 2026 · Assigned by WPScan
CVE-2026-16269Newsletters < 4.16 - Unauthenticated API Authentication Bypass via Type Juggling
Medium 4.8
In plain English
A medium-severity improper authentication in Newsletters from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).
Severity (CVSS 3.1)4.8Medium
Exploit odds (30 days)0.4%top 69.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | Newsletters | 0 – before 4.16 |
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
References
- https://wpscan.com/vulnerability/8b09afba-16a5-4d6c-9e85-84433a3c0d66/ exploit, vdb-entry, technical-description