What the vulnerability does
01Description
The POST SMTP – The #1 WordPress SMTP Plugin with Advanced Email Logging and Delivery Failure Notifications plugin for WordPress is vulnerable to time-based SQL Injection via the selected parameter in all versions up to, and including, 2.9.3 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers with administrator access or higher to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Explanation of Vulnerability in Simple Terms
02Summary
Post SMTP versions up to 2.9.3 contain a SQL injection vulnerability in database queries. An attacker with high-level privileges can inject malicious SQL code to read, modify, or delete database records. This affects the plugin's core functionality and could compromise email logs, SMTP settings, and other stored data.
What an attacker can do
03Attacker Capabilities
Read, modify, or delete database records via SQL injection.
Potential impact on your site
04Site Impact
A compromised admin account could expose email logs, SMTP credentials, and other sensitive plugin data.
Conditions required to exploit
05Prerequisites
Attacker must have high-level admin or equivalent privileges on the WordPress site.
Key dates
06Disclosure timeline
May 30, 2024
CVE published
April 8, 2026
Record updated
