Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App
post-smtp · plugin
Known security vulnerabilities for Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App. Find out in seconds which version runs on your site with WP Lens.
20 known vulnerabilities
3 critical · 12 exploitable without logging in · 3 with public exploit code · latest Aug 31, 2026
Listed on wordpress.org · latest 4.0.2 · last updated Sep 24, 2026 · 300K+ installs
wordpress.org status checked on Oct 2, 2026
Vulnerabilities
- Critical 9.8
CVE-2025-11833unauthenticated≤ 3.6.0
Post SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App <= 3.6.0 - Missing Authorization to Account Takeover via Unauthenticated Email Lo
- Critical 9.8
CVE-2023-52233unauthenticated≤ 2.8.6
WordPress POST SMTP Mailer plugin <= 2.8.6 - Broken Access Control on API vulnerability
- Critical 9.8
CVE-2023-6875unauthenticated≤ 2.8.7
POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress <= 2.8.7 - Authorization Bypass via type connect-app API
- High 8.8
CVE-2025-24000login required≤ 3.2.0
WordPress Post SMTP plugin <= 3.2.0 - Account Takeover Vulnerability
- High 8.8
CVE-2025-22800login required≤ 2.9.11
WordPress Post SMTP plugin <= 2.9.11 - Broken Access Control vulnerability
- High 7.2
CVE-2026-3090unauthenticated≤ 3.8.0
Post SMTP <= 3.8.0 - Unauthenticated Stored Cross-Site Scripting via 'event_type'
- High 7.2
CVE-2024-52436high privilege≤ 2.9.9
WordPress Post SMTP plugin <= 2.9.9 - SQL Injection vulnerability
- High 7.2
CVE-2024-5207admin≤ 2.9.3
POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress <= 2.9.3 - Authenticated (Administrator+) SQL Injection
- High 7.1
CVE-2026-48838unauthenticated · needs a click≤ 3.6.2
WordPress Post SMTP plugin <= 3.6.2 - Cross Site Scripting (XSS) vulnerability
- Medium 6.1
CVE-2025-0521unauthenticated≤ 3.0.2
Post SMTP <= 3.0.2 - Unauthenticated Stored Cross-Site Scripting
- Medium 6.1
CVE-2024-29128unauthenticated · needs a click≤ 2.8.6
WordPress POST SMTP Mailer plugin <= 2.8.6 - Reflected Cross Site Scripting (XSS) vulnerability
- Medium 6.1
CVE-2023-6629unauthenticated · needs a click≤ 2.8.6
POST SMTP Mailer <= 2.8.6 - Reflected Cross-Site Scripting via msg
- Medium 6.1
CVE-2023-3082unauthenticated≤ 2.5.7
Post SMTP <= 2.5.7 - Unauthenticated Stored Cross-Site Scripting via Email
- Medium 5.4
CVE-2023-7027unauthenticated≤ 2.8.7
POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress <= 2.8.7 - Unauthenticated Stored Cross-Site Scripting via device
- Medium 5.4
CVE-2026-81278login required≤ beta.1
WordPress Post SMTP plugin 4.0.0-beta.1 - Settings Change vulnerability
- Medium 5.3
CVE-2025-67563unauthenticated≤ 3.6.1
WordPress Post SMTP plugin <= 3.6.1 - Broken Access Control vulnerability
- Medium 5.3
CVE-2026-2559subscriber+≤ 3.8.0
Post SMTP <= 3.8.0 - Missing Authorization to Authenticated (Subscriber+) Office 365 OAuth Configuration Overwrite
- Medium 4.9
CVE-2024-13844admin≤ 3.1.2
Post SMTP <= 3.1.2 - Authenticated (Administrator+) SQL Injection via columns Parameter
- Medium 4.3
CVE-2021-4422unauthenticated · needs a click≤ 2.0.20
POST SMTP Mailer <= 2.0.20 - Cross-Site Request Forgery Bypass
- Medium 4.3
CVE-2025-9219subscriber+≤ 3.4.1
Post SMTP <= 3.4.1 - Missing Authorization to Authenticated (Subscriber+) Limited Plugin Option Update
The access label is read from the record's own text (e.g. “subscriber+”: subscriber and above). When the text names no role, CVSS decides between “login required” and “high privilege”; no role name is invented. “Needs a click”: the attack depends on a logged-in user following a link (CSRF, reflected XSS).