---
id: CVE-2026-10196
title: >-
  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 'han…
summary: >-
  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 'han…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
published: '2026-09-05'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T13:12:58.310'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-10196'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/mail-mint/tags/1.21.0/app/API/Actions/Frontend/FormAction.php#L59
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/mail-mint/tags/1.21.0/app/Database/models/ContactModel.php#L460
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/mail-mint/tags/1.21.0/vendor/posthog/posthog-php/lib/Consumer/ForkCurl.php#L96
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/mail-mint/trunk/app/API/Actions/Frontend/FormAction.php#L59
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/mail-mint/trunk/app/Database/models/ContactModel.php#L460
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/mail-mint/trunk/vendor/posthog/posthog-php/lib/Consumer/ForkCurl.php#L96
    label: security@wordfence.com
  - url: 'https://plugins.trac.wordpress.org/changeset/3545065/'
    label: security@wordfence.com
  - url: 'https://plugins.trac.wordpress.org/changeset/3675453/'
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/76c073d9-9572-43e4-82eb-49adf678535b?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00628
epssPercentile: 0.48723
ingestedAt: '2026-09-06T07:51:56.889Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.