CVE-2026-13156
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk1th percentile - higher than 1% of all known CVEs
Summary
The MailerSend WordPress plugin before version 1.0.8 does not perform a nonce check on its configuration-delete action, allowing an attacker to trick a logged-in administrator into visiting a crafted page that wipes the SMTP configuration and deactivates the plugin, breaking email delivery.
Risk Assessment
The risk involves potential disruption of email delivery for the organization, which can lead to loss of customer communication and business process interruptions.
Recommendation
It is recommended to immediately update the MailerSend plugin to version 1.0.8 or later, which includes a fix for the CSRF vulnerability.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS