A SQL injection vulnerability exists in the Icegram Email Subscribers & Newsletters plugin through 4.1.7 for WordPress. Successful exploitation of this vulnerability would allow a remote attacker to execute arbitrary SQL commands on the affected system.

The WordPress plugin, Email Subscribers & Newsletters, before 4.2.3 had a flaw that allowed unauthenticated file download with user information disclosure.

Cross-site scripting vulnerability in Email Subscribers & Newsletters versions prior to 3.5.0 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

An issue was discovered in the "Email Subscribers & Newsletters" plugin before 3.4.8 for WordPress. Sending an HTTP POST request to a URI with /?es=export at the end, and adding option=view_all_subscribers in the body, allows downloading of a CSV data file with all subscriber data.