CVE-2026-78003criticalobserved exploitationCWE-918

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

50Vexday Risk Score

Prioritize patching. It exploitation observed by VulnCheck.

ssvc Actcvss 9.8epss 0.9%

from disclosure to weapon

Published on NVDAug 22

VulnCheck+6d

exploitation probability

0.9%top 43% of all CVEs

observed exploitation

yesVulnCheck

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.

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

Affected products

mailgun · Mailgun for WordPress

References