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Input validation vulnerability in POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress 2.6.1

  • Severity: high-risk
  • Status: Fixed
  • Publication: October 3, 2023

The Post SMTP plugin is a WordPress plugin that is vulnerable to a type of cyberattack called “time-based SQL Injection.” This means that attackers who have administrator-level privileges could use this vulnerability to access sensitive information stored in the database. The vulnerability exists in versions of the plugin up to and including version 2.6.0. It is caused by the software not properly preparing existing SQL queries and not sufficiently escaping user-supplied parameters.

Detected in:

POST SMTP – The #1 WordPress SMTP Plugin with Advanced Email Logging and Delivery Failure Notifications fixed vulnerable versions:
Post SMTP – The Complete WP SMTP Plugin with Email Logs and Mobile app for email Failure Notifications fixed vulnerable versions:
Post SMTP – The WordPress SMTP Plugin with Email Logs and Mobile App for Email Failure Notifications fixed vulnerable versions:
Post SMTP – WordPress SMTP Plugin with Email Logs and Mobile App for Failure Notifications – Gmail SMTP, Office 365, Brevo, Mailgun, Amazon SES and more fixed vulnerable versions:
Post SMTP – WP SMTP Plugin with Email Logs & Mobile App for Failure Alerts – Any SMTP Plus Gmail SMTP, Office 365, Brevo, Mailgun, Amazon SES, Postmark fixed vulnerable versions:
Post SMTP – WP SMTP Plugin with Email Logs and Mobile App for Failure Notifications – Gmail SMTP, Office 365, Brevo, Mailgun, Amazon SES and more fixed vulnerable versions:
POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress fixed vulnerable versions: >= * < 2.6.1

This information is sourced from www.wpvulnerability.com. An open-source database of vulnerabilities maintained by the community. Help us out by submitting vulnerabilities!

Version compare shows which versions have a vulnerability. For example: >= 2.2.8 <= 2.2.21 means:

> from 2.2.8
= including 2.2.8 & 2.2.21
< to 2.2.21

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