WordPress plugin
Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App security & vulnerabilities
Unpatched vulnerability in the latest version
At least one vulnerability affects the latest version and no fix has been released. Deactivate the plugin or restrict access to the affected feature until the vendor ships a patch.
- Critical2
- High11
- Medium15
- Low0
All Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App vulnerabilities
- High7.2Unauthenticated Stored DOM-Based Cross-Site Scripting via 'user_email' Parameter (Multisite Registration → Failed Email Log)
≤4.0.1Update to 4.0.2
- Medium6.3Missing Authorization to Authenticated (Subscriber+) Settings Change
4.0.0-beta.1 – 4.0.0-beta.1Update to 4.0.1
- High7.2Unauthenticated Stored Cross-Site Scripting
≤3.6.2Update to 3.6.3
- Medium6.1Reflected DOM-Based Cross-Site Scripting via url Parameter
≤5.5.8Update to 5.5.9
- High7.2Unauthenticated Stored Cross-Site Scripting via 'event_type'
≤3.8.0Update to 3.9.0
- Medium5.3Missing Authorization to Authenticated (Subscriber+) Office 365 OAuth Configuration Overwrite
≤3.8.0Update to 3.9.0
- Medium5.4Missing Authorization to Authenticated (Subscriber+) OAuth Token Update
≤3.6.1Update to 3.6.2
- Critical9.8Missing Authorization to Account Takeover via Unauthenticated Email Log Disclosure
≤3.6.0Update to 3.6.1
- Medium4.3Missing Authorization to Authenticated (Subscriber+) Limited Plugin Option Update
≤3.4.1Update to 3.4.2
- High8.8Missing Authorization to Authenticated (Subscriber+) Account Takeover via Email Log Exposure
≤3.2.0Update to 3.3.0
- Medium4.9Authenticated (Administrator+) SQL Injection via columns Parameter
≤3.1.2Update to 3.1.3
- High7.2Unauthenticated Stored Cross-Site Scripting
≤3.0.2Update to 3.1.0
- Medium4.3Missing Authorization via regenerate_qrcode()
≤2.9.11Update to 2.9.12
- Medium4.9Authenticated (Administrator+) SQL Injection
≤2.9.9Update to 2.9.10
- High7.2Authenticated (Administrator+) SQL Injection
≤2.9.3Update to 2.9.4
- Critical9.8Authorization Bypass via type connect-app API
≤2.8.7Update to 2.8.8
- High7.2Unauthenticated Stored Cross-Site Scripting via device
≤2.8.7Update to 2.8.8
- Medium6.1Reflected Cross-Site Scripting via msg
≤2.8.6Update to 2.8.7
- High7.2Authenticated (Administrator+) SQL Injection
≤2.8.6Update to 2.8.7
- High7.2Unauthenticated Stored Cross-Site Scripting
≤2.7.0Update to 2.7.1
- High7.2Authenticated (Administrator+) SQL Injection
<2.6.1Update to 2.6.1
- Medium6.1Reflected Cross-Site Scripting via fs_request_get
≤1.9.2No patch available
- High7.2Unauthenticated Stored Cross-Site Scripting via Email
≤2.5.7Update to 2.5.8
- Medium6.5Cross-Site Request Forgery to Account Compromise
≤2.5.6Update to 2.5.7
- Medium4.3Cross-Site Request Forgery to Arbitrary Log Deletion
≤2.5.6Update to 2.5.7
- Medium6.6Authenticated (Administrator+) Blind Server-Side Request Forgery
≤2.1.6Update to 2.1.7
- Medium5.5Authenticated (Admin+) Stored Cross-Site Scripting
≤2.1.3Update to 2.1.4
- Medium4.3Cross-Site Request Forgery Bypass
≤2.0.20Update to 2.0.21
Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App: common questions
Does Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App have known vulnerabilities?
Yes. VulnCrest Radar lists 28 known vulnerabilities in Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App: 2 critical, 11 high, 15 medium. At least one is not fixed in the latest version.
How do I check which version of Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App I run?
In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.
What is the most recent Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App vulnerability?
CVE-2026-75962, published Oct 5, 2026: Post SMTP <= 4.0.1 - Unauthenticated Stored DOM-Based Cross-Site Scripting via 'user_email' Parameter (Multisite Registration → Failed Email Log). Severity: High (CVSS 7.2).
Is any Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App vulnerability listed in CISA KEV?
No. None of the known Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App vulnerabilities is currently listed in the CISA KEV catalog.