Mailgun for WordPress <= 2.2.0 - Unauthenticated Server-Side Request Forgery (SSRF) via 'addresses' Array Keys

Wordfence Intelligence > Vulnerability Database > Mailgun for WordPress <= 2.2.0 - Unauthenticated Server-Side Request Forgery (SSRF) via 'addresses' Array Keys

9.8

Server-Side Request Forgery (SSRF)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVE	CVE-2026-78003
CVSS	9.8 (Critical)
Publicly Published	August 21, 2026
Last Updated	August 22, 2026
Researcher	Osvaldo Noe Gonzalez Del Rio (Os) - krei.dev \| ogbuilders.io

Description

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.

References

Vulnerability Details for Mailgun for WordPress

Mailgun for WordPress

Software Type	Plugin
Software Slug	mailgun (view on wordpress.org)
Patched?	Yes
Remediation	Update to version 2.2.1, or a newer patched version
Affected Version	<= 2.2.0
Patched Version	2.2.1

Recent vulnerabilities in Mailgun for WordPress

Mailgun for WordPress <= 2.2.0 - Missing Authorization to Unauthenticated Arbitrary Mailgun List Subscription

5.3

CVE-2026-14834

Jul 13, 2026

Researcher: Pedro Pinho

#	Title	CVE ID	CVSS	Researchers	Date
1	Mailgun for WordPress <= 2.2.0 - Missing Authorization to Unauthenticated Arbitrary Mailgun List Subscription	CVE-2026-14834	5.3	Pedro Pinho	July 13, 2026

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