POST SMTP – The #1 WordPress SMTP Plugin with Advanced Email Logging and Delivery Failure Notifications, CVE-2026-3090
- CVE, Research URL
- Published on
- Mar 18, 2026
- Research Description
- The Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘event_type’ parameter in all versions up to, and including, 3.8.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerability is only exploitable when the Post SMTP Pro plugin is also installed and its Reporting and Tracking extension is enabled.
- Affected versions
-
max 3.9.0.
- Status
-
vulnerable
| Previous vulnerability researches |
|---|
| VikAppointments Services Booking Calendar (CVE-2025-22719) , Jan 19, 2025 |