CVE-2026-16268

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

Published Aug 6, 2026 CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions newsletters
Vendors & Products Wordpress-extensions
Wordpress-extensions newsletters
Type Values Removed Values Added
Weaknesses CWE-918
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Newsletters < 4.16 - Unauthenticated Server-Side Request Forgery via SNS Bounce Handler
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Aug 6, 2026, 2:08 PM
Reserved
Jul 20, 2026, 9:09 AM
Status
Deferred
Published
Aug 6, 2026, 7:16 AM
Modified
Aug 26, 2026, 4:31 PM