Description
WordPress Plugin Post SMTP-WP SMTP with Email Logs & Mobile App for Failure Alerts-Any SMTP Plus Gmail SMTP, Office 365, Brevo, Mailgun, Amazon SES, Postmark is prone to an SQL injection vulnerability because it fails to sufficiently sanitize user-supplied data before using it in an SQL query. Exploiting this issue could allow an attacker to compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database. WordPress Plugin Post SMTP-WP SMTP with Email Logs & Mobile App for Failure Alerts-Any SMTP Plus Gmail SMTP, Office 365, Brevo, Mailgun, Amazon SES, Postmark version 2.8.6 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 2.8.7 or latest
References
https://sploitus.com/exploit?id=WPEX-ID:AB5C42CA-EE7D-4344-BD88-0D727ED3D9C4
https://plugins.svn.wordpress.org/post-smtp/trunk/readme.txt