vulnerability
WordPress Plugin: nmedia-user-file-uploader: CVE-2021-4350: Missing Authorization
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:N/AC:L/Au:N/C:N/I:P/A:P) | Jul 12, 2021 | May 15, 2025 | Apr 29, 2026 |
Severity
6
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:P)
Published
Jul 12, 2021
Added
May 15, 2025
Modified
Apr 29, 2026
Description
The Frontend File Manager plugin for WordPress is vulnerable to Unauthenticated HTML Injection in versions up to, and including, 18.2. This is due to lacking authentication protections on the wpfm_send_file_in_email AJAX action. This makes it possible for unauthenticated attackers to send emails using the site with a custom subject, recipient email, and body with unsanitized HTML content. This effectively lets the attacker use the site as a spam relay.
Solution
nmedia-user-file-uploader-plugin-cve-2021-4350
References
Rapid7 Labs
2026 Global Threat Landscape Report
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