Mailgun for WordPress <= 2.2.0 - Missing Authorization to Unauthenticated Arbitrary Mailgun List Subscription
The Mailgun for WordPress plugin for WordPress is vulnerable to unauthorized access in versions up to, and including, 2.2.0. This is due to missing nonce verification and lack of server-side validation of submitted list addresses against configured lists in the add_list() function. This makes it possible for unauthenticated attackers to subscribe arbitrary email addresses to any Mailgun mailing list configured on the site without authentication.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Mailgun for WordPress | <= 2.2.0 | 2.2.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-862- Platform
- WordPress
- Package
Mailgun for WordPress- Disclosed
- 13.07.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 08f7800a-3c05-4654-b909-625c304d4129 - Wordfence Intelligence
Copyright 1999-2026 The MITRE Corporation
Copyright 2012-2026 Defiant Inc.
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Vulnerability history: Mailgun for WordPress
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 07.2026 08.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- Medium 1
Disclosures per year
- 2026: 2
-
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