CVE-2026-1565
Arbitrary File Upload in User Frontend Plugin Enables RCE
Publication date: 2026-02-26
Last updated on: 2026-02-26
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 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 Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
[{'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]