CVE-2023-3087
FluentSMTP <= 2.2.4 - Unauthenticated Stored Cross-Site Scripting via Email Subject
CVSS Score
7.2
EPSS Score
0.0%
EPSS Percentile
0th
The FluentSMTP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via an email subject in versions up to, and including, 2.2.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
| CWE | CWE-79 |
| Vendor | techjewel |
| Product | fluentsmtp – wp smtp plugin with amazon ses, sendgrid, mailgun, postmark, google and any smtp provider |
| Published | Jul 12, 2023 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
techjewel / FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider
0 ≤ 2.2.4
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/fa47a794-e5ce-491d-a10b-c7c5718aa853?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/2935217/fluent-smtp/trunk/app/Services/Mailer/BaseHandler.php plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/2935217/fluent-smtp/trunk/app/Models/Logger.php
Credits
Alex Thomas