CVE-2026-16269
Medium
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.
SeverityMedium
CVSS4.8
Exploit probability—
ProductNewsletters
PublishedAug 8, 2026
First seenAug 8, 2026
Weakness typeCWE-287Improper authentication
How to fix
Update
- Newsletters4.16 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Newsletters | v < 4.16 | 4.16 |
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