The Post SMTP – WP SMTP Plugin with Email Logs and Mobile App for Failure Notifications – Gmail SMTP, Office 365, Brevo, Mailgun, Amazon SES and more plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'update_post_smtp_pro_option_callback' function in all versions up to, and including, 3.4.1. This makes it possible for authenticated attackers, with Subscriber-level access and above, to enable pro extensions.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Post Smtp Plugin | — | Update post-smtp plugin to version 3.4.2, or a newer patched version | Sep 3, 2025 | Sep 2, 2025 |
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