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.

Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in acmailer CGI ver.4.0.3 and earlier and acmailer DB ver.1.1.5 and earlier. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker.

Cross-site scripting vulnerability exists in acmailer CGI ver.4.0.5 and earlier. An arbitrary script may be executed on the web browser of the user who accessed the management page of the affected product.

Cross-Site Request Forgery (CSRF) vulnerability in Gordon French Comment-Emailer allows Stored XSS.This issue affects Comment-Emailer: from n/a through 1.0.5.

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.

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 Freemius SDK, as used by hundreds of WordPress plugin and theme developers, was vulnerable to Cross-Site Request Forgery and Information disclosure due to missing capability checks and nonce protection on the _get_debug_log, _get_db_option, and the _set_db_option functions in versions up to, and including 2.4.2. Any WordPress plugin or theme running a version of Freemius less than 2.4.3 is vulnerable.

Missing Authorization vulnerability in MailerLite MailerLite – WooCommerce integration.This issue affects MailerLite – WooCommerce integration: from n/a through 2.0.8.

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.