CVE-2022-1604: Mailerlite Signup Forms

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

The MailerLite WordPress plugin before 1.5.4 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting

Affected products

• Mailerlite Mailerlite Signup Forms: before 1.5.4 (fixed in 1.5.4)

Published 2022-06-13. Last modified 2026-06-17.