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Mailgun for WordPress vulnerabilities
Mailgun for WordPress has 1 known vulnerability in this database. The most recent published record is dated 22 Aug 2026.
- Known vulnerabilities
- 1
- Active installs
- 80,000+
- Latest version
- 2.2.3
- Last updated
- 25 Sep 2026
- Most recent
- 22 Aug 2026
Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.
| Vulnerability | Severity | Affected | Fix | Published |
|---|---|---|---|---|
| Authentication bypass CVE-2026-78003 | Critical 9.8 | Up to 2.2.0 | Fixed in a later version (latest 2.2.3) | 22 Aug 2026 |
Read the published descriptions
- CVE-2026-78003, 22 Aug 2026
- The Mailgun for WordPress plugin for WordPress is vulnerable to Server-Side Request Forgery (SSRF) via path traversal in versions up to and including 2.2.0. This is due to insufficient input validation in the add_list() function, which accepts user-controlled array keys from $_POST['addresses'], passes them through sanitize_text_field(). This makes it possible for unauthenticated attackers to make authenticated POST requests to any Mailgun API endpoint using the WordPress site's API key, including creating inbound email-forwarding routes that can intercept password reset emails, leading to administrator account takeover. CVE record
What to do if you run Mailgun for WordPress
If you run Mailgun for WordPress, open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.
If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.
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