CVE-2026-13156: Unknown Mailersend

Medium severity, CVSS 5.4. EPSS: 0.1% chance of exploitation in the next 30 days.

The MailerSend WordPress plugin before 1.0.8 does not perform a nonce check on its configuration-delete action (it verifies the manage_options capability but ignores the nonce), so an attacker can trick a logged-in administrator into visiting a crafted page that wipes the MailerSend WordPress plugin before 1.0.8's SMTP configuration and deactivates the MailerSend WordPress plugin before 1.0.8, breaking the site's email delivery.

Affected products

• Unknown Mailersend: before 1.0.8 (fixed in 1.0.8)

Published 2026-07-20. Last modified 2026-07-20.