CVE-2026-12583

Newsletters < 4.15 - Unauthenticated PHP Object Injection via Subscriber Custom Field

Published Jul 14, 2026 CVSS 3.1 · 8.1 High EPSS 2.0% KEV · Not listed
Description
The Newsletters WordPress plugin before 4.15 does not prevent deserialization of untrusted input that is stored through a public form, allowing unauthenticated attackers to inject a PHP object and, via a property-oriented gadget chain bundled with the Newsletters WordPress plugin before 4.15, write arbitrary files and execute code on the server.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

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-502
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

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

Type Values Removed Values Added
Description The Newsletters WordPress plugin before 4.15 does not prevent deserialization of untrusted input that is stored through a public form, allowing unauthenticated attackers to inject a PHP object and, via a property-oriented gadget chain bundled with the Newsletters WordPress plugin before 4.15, write arbitrary files and execute code on the server.
Title Newsletters < 4.15 - Unauthenticated PHP Object Injection via Subscriber Custom Field
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Jul 14, 2026, 12:28 PM
Reserved
Jun 18, 2026, 7:06 AM
Status
Deferred
Published
Jul 14, 2026, 6:17 AM
Modified
Jul 14, 2026, 4:42 PM