4.8
Medium
CVE-2026-16269 The Newsletters WordPress plugin before 4.16 does not strictly compare its API authentication key, allowing…
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 and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Newsletters 4.16 | earliest → < 4.16 | 4.16 |
Other CVEs of Newsletters
The 8 CVEs of Newsletters →
CVE-2026-16264
The Newsletters WordPress plugin before 4.18.1 does not perform an ownership check on some of its subscriber…
6.5
Medium
CVE-2026-17522
The Newsletters WordPress plugin before 4.17 does not perform any nonce or capability check when saving one of its…
5.4
Medium
CVE-2026-17520
The Newsletters WordPress plugin before 4.17 does not generate its API key using a sufficiently random source,…
4.8
Medium
CVE-2026-16267
The Newsletters WordPress plugin before 4.16 does not restrict the classes allowed when unserialising a value taken from…
8.1
High