WP Mailgun SMTP
WP Mailgun SMTP has 2 disclosed vulnerabilities in the WordSec catalog, all reported in 2025; none of them are fixed as of September 2026. Their average CVSS score is 5.3, and the most serious one scores 5.3 out of 10. 2025 was the busiest year with 2 disclosures.
The most common weakness is Exposure Of Sensitive Information To An Unauthorized Actor, behind 1 of the records (50%). Other recurring categories include Missing Authorization.
None of the 2 issues recorded for WP Mailgun SMTP have a published fix yet, which makes virtual patching the only reliable mitigation. The oldest unresolved one dates back to 2025.
2 independent researchers contributed these findings, one record each. WP Mailgun SMTP is installed on roughly 900 WordPress sites, so each unpatched flaw has a wide blast radius. The current release is tested up to WordPress 4.9.31.
CVE-2025-59003Multiple Plugins and Themes by inkthemes <= 1.1.8 - Unauthenticated Information Exposure
Read the full analysisVulnerability Records

WP Mailgun SMTP
Author
inkthemes
An SMTP service is must in order to resolve the deliverability issues, limitations, you face while sending emails through your WordPress website. With an SMTP service, seamless email deliverability directly from your WordPress website becomes a reality. Mailgun WP SMTP plugin connects Mailgun to your WordPress website and bypasses the default wp_mail() PHP function in WordPress and sends your email via Mailgun SMTP service. Now the Mailgun SMTP service will take charge of your emails, and make sure your emails will be delivered at maximum. SMTP interacts with the email server and validates your emails as per the server protocols. You might have several question peeking in your mind. Here are several good articles as reference and they may help you otherwise – * **Cheap SMTP Servers * **Best SMTP Relay Services What is SMTP? Why it is required? SMTP (Simple Mail Transfer Protocol) in simple terms, is a proper infrastructure for sending emails. SMTP helps deliver your emails in a more authentic manner to bring about a better delivery rate. Otherwise several numerous reasons may cause your emails to fall in your user’s ‘spam emails’ folder, or remain undelivered. Maximum of your clients use email service either of Gmail, Yahoo, Outlook, etc. They have insanely enormous email transfers to manage, and they have strict rules to prevent spam emails from reaching their users. With an SMTP service, you satisfy their protocol, and get your emails delivered right in your client’s inbox. It handles all of the heavy lifting to bring about a better of email delivery rate. So you know the importance of using a dedicated SMTP service. Now, this Mailgun SMTP WP plugin lets you add more facility to your WordPress website, if you use Mailgun SMTP service. However, there are serveral smtp service providers also available. Below are some more sources of information that you might need in this regard. Email Marketing Services Best Email Marketing Services Cheap Email Marketing Services Free Email Marketing Software Plugin Features: Simply Add Username and Password and start delivering emails through Mailgun. You can also change the “from email” address and “from name”. BELOW ARE THE LIST OF SETTINGS THAT YOU HAVE TO ADD TO START USING THE PLUGIN: Hostname: Hostname field will be automatically pre-filled. Username: Add SMTP username that’s been provided by Mailgun for sending emails. Password: Add SMTP password to connect with Mailgun. Protocol: Protocol field will be automatically pre-filled.
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