CVE-2026-1565
Received Received - Intake
Arbitrary File Upload in User Frontend Plugin Enables RCE

Publication date: 2026-02-26

Last updated on: 2026-02-26

Assigner: Wordfence

Description
The User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration plugin for WordPress is vulnerable to arbitrary file uploads due to incorrect file type validation in the 'WPUF_Admin_Settings::check_filetype_and_ext' function and in the 'Admin_Tools::check_filetype_and_ext' function in all versions up to, and including, 4.2.8. This makes it possible for authenticated attackers, with Author-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-02-26
Last Modified
2026-02-26
Generated
2026-06-16
AI Q&A
2026-02-26
EPSS Evaluated
2026-06-14
NVD
CVE-2026-1565
EUVD
EUVD-2026-8875
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
we_devs wp_user_frontend to 4.2.8 (inc)
wp_user_frontend wp_user_frontend to 4.2.8 (inc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

The vulnerability exists in the User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration plugin for WordPress. It is caused by incorrect file type validation in the functions 'WPUF_Admin_Settings::check_filetype_and_ext' and 'Admin_Tools::check_filetype_and_ext' in all versions up to and including 4.2.8.

This flaw allows authenticated attackers with Author-level access or higher to upload arbitrary files to the affected site's server. Because the file type validation is insufficient, malicious files can be uploaded, potentially enabling remote code execution on the server.

Impact Analysis

If exploited, this vulnerability can allow an attacker with Author-level permissions or above to upload arbitrary files, including potentially malicious scripts, to your WordPress server.

This can lead to remote code execution, meaning the attacker could run malicious code on your server, which might result in unauthorized access, data theft, site defacement, or complete site takeover.

The CVSS score of 8.8 (High) reflects the severity and potential impact of this vulnerability.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

[{'type': 'paragraph', 'content': 'To mitigate the arbitrary file upload vulnerability in the User Frontend plugin for WordPress, you should immediately update the plugin to version 4.2.9 or later, where strict validation for file uploads, especially JSON files, has been implemented.'}, {'type': 'list_item', 'content': 'Update the WP User Frontend plugin to version 4.2.9 or newer.'}, {'type': 'list_item', 'content': "Ensure that only users with the 'manage_options' capability (typically administrators) can upload JSON files, as enforced in the updated plugin."}, {'type': 'list_item', 'content': "Verify that the plugin's file upload validation functions reject files with dangerous extensions or embedded executable code."}, {'type': 'paragraph', 'content': 'These steps help prevent authenticated attackers with Author-level access or above from uploading arbitrary files that could lead to remote code execution.'}] [2]

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-1565. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart