Post SMTP <= 3.4.1 - Missing Authorization to Authenticated (Subscriber+) Limited Plugin Option Update

Missing Authorization
CVE CVE-2025-9219
CVSS Medium (4.3)
Publicly Published September 2, 2025
Last Updated September 3, 2025
Researcher Matteo Leonelli, David D.
Description

The Post SMTP – WP SMTP Plugin with Email Logs and Mobile App for Failure Notifications – Gmail SMTP, Office 365, Brevo, Mailgun, Amazon SES and more plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'update_post_smtp_pro_option_callback' function in all versions up to, and including, 3.4.1. This makes it possible for authenticated attackers, with Subscriber-level access and above, to enable pro extensions.

References

1 affected software package

Software Type Plugin
Software Slug post-smtp (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 3.4.1
Patched Version
  • 3.4.2
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