The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to unauthorized access of data and modification of data due to a type juggling issue on the connect-app REST endpoint in all versions up to, and including, 2.8.7. This makes it possible for unauthenticated attackers to reset the API key used to authenticate to the mailer and view logs, including password reset emails, allowing site takeover.

The YaySMTP and Email Logs: Amazon SES, SendGrid, Outlook, Mailgun, Brevo, Google and Any SMTP Service plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions 2.4.9 to 2.6.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Note: The vulnerability has been initially patched in version 2.4.8 and was reintroduced in version 2.4.9 with the removal of the wp_kses_post() built-in WordPress sanitization function.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Myriad Solutionz Stars SMTP Mailer allows Reflected XSS.This issue affects Stars SMTP Mailer: from n/a through 1.7.

Missing Authorization vulnerability in David Cramer Caldera SMTP Mailer.This issue affects Caldera SMTP Mailer: from n/a through 1.0.1.

Missing Authorization vulnerability in Tech Banker Mail Bank - #1 Mail SMTP Plugin for WordPress allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Mail Bank - #1 Mail SMTP Plugin for WordPress: from n/a through 4.0.14.

The FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.2.82 via deserialization of untrusted input in the 'formatResult' function. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code. The vulnerability was partially patched in version 2.2.82.

Unrestricted Upload of File with Dangerous Type vulnerability in Myriad Solutionz Stars SMTP Mailer allows Upload a Web Shell to a Web Server.This issue affects Stars SMTP Mailer: from n/a through 1.7.

The WP Mail SMTP plugin for WordPress is vulnerable to information exposure in all versions up to, and including, 4.0.1. This is due to plugin providing the SMTP password in the SMTP Password field when viewing the settings. This makes it possible for authenticated attackers, with administrative-level access and above, to view the SMTP password for the supplied server. Although this would not be useful for attackers in most cases, if an administrator account becomes compromised this could be useful information to an attacker in a limited environment.

Missing Authorization vulnerability in Post SMTP Post SMTP Mailer/Email Log.This issue affects Post SMTP Mailer/Email Log: from n/a through 2.8.6.

Cross-Site Request Forgery (CSRF) vulnerability in Photoboxone SMTP Mail.This issue affects SMTP Mail: from n/a through 1.3.20.