What’s Vulnerable › Vulnerabilities

CVE-2025-12887: Post SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App <= 3.6.1 - Missing Authorization to Authenticated (Subscriber+) OAuth Token Update

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-03 · updated 2026-10-18
• Weakness: CWE-862

Description

The Post SMTP plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.6.1. This is due to the plugin not properly verifying that a user is authorized to update OAuth tokens on the 'handle_gmail_oauth_redirect' function. This makes it possible for authenticated attackers, with subscriber level access and above, to inject invalid or attacker-controlled OAuth credentials. CVE-2025-67563 appears to be a duplicate of this issue.

Affected products

• saadiqbal Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App: through 3.6.1

References

• https://plugins.trac.wordpress.org/changeset/3402203
• https://www.wordfence.com/threat-intel/vulnerabilities/id/5bd9f312-99e1-4dc2-855d-90339c2e24da?source=cve

Get alerted when CVE-2025-12887 or the next vulnerability affects your stack