FluentSMTP – WP Mail SMTP Plugin with Amazon SES, SendGrid, Mailgun, Postmark, Cloudflare, toSend, Gmail and Any SMTP
fluent-smtp · plugin
Known security vulnerabilities for FluentSMTP – WP Mail SMTP Plugin with Amazon SES, SendGrid, Mailgun, Postmark, Cloudflare, toSend, Gmail and Any SMTP. Find out in seconds which version runs on your site with WP Lens.
4 known vulnerabilities
1 critical · 4 exploitable without logging in · latest Aug 6, 2026
Listed on wordpress.org · latest 2.4.1 · last updated Sep 27, 2026 · 700K+ installs
wordpress.org status checked on Oct 2, 2026
Vulnerabilities
- Critical 9.8
CVE-2024-9511unauthenticated≤ 2.2.82
FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider <= 2.2.82 - Unauthenticated PHP Object Injection
- High 7.2
CVE-2026-16636unauthenticated≤ 2.2.95
FluentSMTP <= 2.2.95 - Unauthenticated Stored Cross-Site Scripting via Recipient Display Name (to.name) in Email Logs
- Medium 6.1
CVE-2023-3087unauthenticated≤ 2.2.4
FluentSMTP <= 2.2.4 - Unauthenticated Stored Cross-Site Scripting via Email Subject
- Medium 4.3
CVE-2025-24739unauthenticated · needs a click≤ 2.2.80
WordPress FluentSMTP plugin <= 2.2.80 - Cross Site Request Forgery (CSRF) vulnerability
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).