CVE-2026-78003 (GCVE-0-2026-78003)

Vulnerability from cvelistv5 – Published: 2026-08-22 08:26 – Updated: 2026-08-25 13:15
VLAI
Title
Mailgun for WordPress <= 2.2.0 - Unauthenticated Server-Side Request Forgery (SSRF) via 'addresses' Array Keys
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 13:14 UTC
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2265 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
mailgun Mailgun for WordPress Affected: 0 , ≤ 2.2.0 (semver)
guessed Create a notification for this product.
Credits
Osvaldo Noe Gonzalez Del Rio (Os)
Show details on NVD website
To clipboard 

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