How severe is CVE-2026-16636?

High severity. CVSS v3 base score is 7.2 out of 10.

XSS in Wpmanageninja Fluentsmtp – Wp Smtp Plugin With Amazon Ses, Sendgrid, Mailgun, Postmark, Cloudflare, Tosend, Gmail And Any

CVE-2026-16636

The FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Recipient Display Name (to.name) in Email Logs in all versions…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Wpmanageninja Fluentsmtp – Wp Smtp Plugin With Amazon Ses, Sendgrid, Mailgun, Postmark, Cloudflare, Tosend, Gmail And Any — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-16636?: CVE-2026-16636 is a high-severity vulnerability in Wpmanageninja Fluentsmtp – Wp Smtp Plugin With Amazon Ses, Sendgrid, Mailgun, Postmark, Cloudflare, Tosend, Gmail And Any, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-08-06.
How severe is CVE-2026-16636?: High severity. CVSS v3 base score is 7.2 out of 10.