CVE-2026-16268

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

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

Newsletters

CVSS v3.1 CNA

8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

EPSS

0.73% chance of exploitation in the next 30 days, 54th percentile

Nuclei

medium · CWE-918

Published

2026-08-06

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/65612dd4-83d8-40c5-8e12-862e9b5f940b/

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-16268.yaml

References

• CVE Record
• NVD entry