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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2025-0312
Missing Authorization check in the Post SMTP plugin for WordPress

Original Issue Date:November 13, 2025

Severity Rating: CRITICAL

Software Affected

  • WordPress Plugin Post SMTP versions 3.6.0 and prior

Overview

A vulnerability has been reported in the Post SMTP plugin for WordPress, which could allow an unauthenticated attacker to access sensitive information on the targeted system.

Target Audience:
Users of affected WordPress Plugins.

Risk Assessment:
High risk of unauthorised access.

Impact Assessment:
Potential for account takeover.

Description

Post SMTP is a WordPress plugin that ensures reliable email delivery by using proper SMTP authentication, offering detailed logs, delivery alerts, backup SMTP options, and mobile app notifications.

The vulnerability in the Post SMTP plugin for WordPress exists due to a missing authorisation check on the construct function.

Successful exploitation of this vulnerability could allow an unauthenticated attacker, which could allow an unauthenticated attacker to access sensitive information on the targeted system.

Solution

Apply appropriate updates as mentioned:
https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/post-smtp/post-smtp-complete-smtp-solution-with-logs-alerts-backup-smtp-mobile-app-360-missing-authorization-to-account-takeover-via-unauthenticated-email-log-disclosure

Vendor Information

Post SMTP
https://wordpress.org/plugins/post-smtp/

References

WordFence
https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/post-smtp/post-smtp-complete-smtp-solution-with-logs-alerts-backup-smtp-mobile-app-360-missing-authorization-to-account-takeover-via-unauthenticated-email-log-disclosure

CVE Name
CVE-2025-11833

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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