CVE-2026-16268highCWE-918

CVE-2026-16268: high-severity vulnerability in Newsletters

Newsletters < 4.16 - Unauthenticated Server-Side Request Forgery via SNS Bounce Handler

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56Vexday Risk Score

Patch soon. It has a working public exploit.

ssvc Attendcvss 8.2epss 0.7%
The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Affected products
Unknown · Newsletters
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Newsletters

In the same product, most dangerous first.

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