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Critical

WP User Frontend < 2.3.11 - Arbitrary File Upload

  • Disclosed: 08.02.2016
  • Updated: 11.10.2026 10:22

The WP User Frontend plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'wpuf_file_upload' and 'wpuf_insert_image' AJAX actions in versions before 2.3.11. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected sites server which may make remote code execution possible.

Affected software

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PlatformPackageVulnerable versionsFixed in
WordPress plugin User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission < 2.3.11 2.3.11

References

CVSS score 9.8/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE)
CWE-434
Platform
WordPress
Package
User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission
Disclosed
08.02.2016
Updated
11.10.2026 10:22

Sources and licenses

Wordfence Intelligence - 8a2186c9-fa27-4d7d-be41-c82711c49334 - Wordfence Intelligence

Copyright 2012-2026 Defiant Inc.

This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/
Wordfence Intelligence
Wordfence Intelligence - Defiant, Inc.
Copyright Defiant, Inc. All rights reserved except as granted below.
License grant, section 3.1 of the Wordfence Intelligence Terms and Conditions (January 26, 2026):

Subject to this Agreement, Company hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute the Service. Any copy you make for such purposes is authorized provided that you reproduce Company’s copyright designation, this license, and the license of any disclosed Company licensor in any such copy.

Full applicable Agreement: https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/

Vulnerability history: User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission

All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (37) in the archive
Total entries
37
First → latest
02.2016 10.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 2
  • High 10
  • Medium 25

Disclosures per year

earlier: 1

Severity:
  1. User Frontend 3.5.29 - 4.3.11 - Unauthenticated Privilege Escalation
    High · 7.3 CVE-2026-75823 >= 3.5.29, <= 4.3.11 4.3.12
  2. User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission <= 4.3.11 - Authenticated (Subscriber+) Arbitrary File Deletion
    High · 8.1 CVE-2026-95525 <= 4.3.11 4.3.12
  3. User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission <= 4.3.10 - Authenticated (Subscriber+) PHP Object Injection
    High · 7.5 CVE-2026-81283 <= 4.3.10 4.3.11
  4. User Frontend <= 4.3.10 - Authenticated (Subscriber+) PHP Object Injection
    High · 7.5 CVE-2026-19116 <= 4.3.10 4.3.11
  5. User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration <= 4.3.1 - Authenticated (Subscriber+) PHP Object Injection
    High · 8.8 CVE-2026-5127 <= 4.3.1 4.3.2
  6. User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration <= 4.2.8 - Authenticated (Author+) Arbitrary File Upload
    High · 8.8 CVE-2026-1565 <= 4.2.8 4.2.9
  7. WP User Frontend <= 4.0.7 - Authenticated (Administrator+) SQL Injection
    Critical · 9.1 CVE-2024-38693 <= 4.0.7 4.0.8
  8. WP User Frontend <= 3.6.5 - Authenticated (Author+) Privilege Escalation
    High · 8.8 CVE-2023-47682 <= 3.6.5 3.6.6
  9. WP User Frontend <= 3.5.28 - Privilege Escalation
    High · 8.1 CVE-2021-24649 <= 3.5.28 3.5.29
  10. WP User Frontend <= 3.5.25 - SQL Injection & Reflected Cross-Site Scripting
    High · 8.8 CVE-2021-25076 <= 3.5.25 3.5.26
  11. WP User Frontend – Membership, Profile, Registration & Post Submission Plugin for WordPress < 3.5.25 - Authenticated (Admin+) SQL Injection
    High · 7.2 3c476263-72b7-48f1-8ba3-91d69eae7b6a < 3.5.25 3.5.25
  12. WP User Frontend < 2.3.11 - Arbitrary File Upload this entry
    Critical · 9.8 8a2186c9-fa27-4d7d-be41-c82711c49334 < 2.3.11 2.3.11

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