Vulnerability Description
The WP Mail Gateway plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on the wmg_save_provider_config AJAX action in all versions up to, and including, 1.8. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update SMTP settings and redirect mail which can be used for privilege escalation by triggering a password reset email and using that to access and administrator's account.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/wp-mail-gateway/tags/1.8/src/Bootstra
- https://plugins.trac.wordpress.org/browser/wp-mail-gateway/tags/1.8/src/Function
- https://plugins.trac.wordpress.org/browser/wp-mail-gateway/trunk/src/Bootstrap.p
- https://plugins.trac.wordpress.org/browser/wp-mail-gateway/trunk/src/Functions.p
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c7caf1f4-a8dd-4016-91e
FAQ
What is CVE-2026-6963?
CVE-2026-6963 is a vulnerability with a CVSS score of 8.8 (HIGH). The WP Mail Gateway plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on the wmg_save_provider_config AJAX action in all versions up to, and including, 1.8. T...
How severe is CVE-2026-6963?
CVE-2026-6963 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-6963?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.