CVE-2023-6621: Wpexperts Post Smtp

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

The POST SMTP WordPress plugin before 2.8.7 does not sanitise and escape the msg parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.

Affected products

• Wpexperts Post Smtp: before 2.8.7 (fixed in 2.8.7)

Published 2024-01-03. Last modified 2026-06-17.