Description
The Mail Mint – Email Marketing, Newsletter, Email Automation & WooCommerce Emails plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.31.0 via deserialization of untrusted input in the 'handle_form_submission' function. This makes it possible for unauthenticated attackers to inject a PHP Object. The additional presence of a POP chain allows attackers to execute code on the server. The vulnerability was partially patched in version 1.23.1.
References9
- plugins.trac.wordpress.org/browser/mail-mint/tags/1.21.0/app/AP…
- plugins.trac.wordpress.org/browser/mail-mint/tags/1.21.0/app/Da…
- plugins.trac.wordpress.org/browser/mail-mint/tags/1.21.0/vendor…
- plugins.trac.wordpress.org/browser/mail-mint/trunk/app/API/Acti…
- plugins.trac.wordpress.org/browser/mail-mint/trunk/app/Database…
- plugins.trac.wordpress.org/browser/mail-mint/trunk/vendor/posth…
- plugins.trac.wordpress.org/changeset/3545065/
- plugins.trac.wordpress.org/changeset/3675453/
- www.wordfence.com/threat-intel/vulnerabilities/id/76c073d9-9572…
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 67 · as of 3 November 2026
- CWE
- CWE-502
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.