Vulnerability · Published Aug 6, 2026 · Assigned by WPScan
CVE-2026-16268Newsletters < 4.16 - Unauthenticated Server-Side Request Forgery via SNS Bounce Handler
High 8.2
In plain English
A high-severity server-side request forgery in Newsletters from Unknown. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.7%top 45.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Nuclei
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | Newsletters | 0 – before 4.16 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
References
- https://wpscan.com/vulnerability/65612dd4-83d8-40c5-8e12-862e9b5f940b/ exploit, vdb-entry, technical-description