CVE-2025-5394 impacts WordPress Theme

Overview

CVE-2025-5394 is a critical vulnerability discovered in the Alone – Charity Multipurpose Non-profit WordPress Theme (versions up to 7.8.3). The flaw exists in the alone_import_pack_install_plugin() function, which fails to properly authenticate users before allowing file uploads.

Detailed Technical Notes

• Vulnerable Function:alone_import_pack_install_plugin()
  • This function is intended for importing theme packs or plugins into a WordPress site using the Alone theme.
  • The crucial security oversight is the absence of any authentication or authorization checks before processing user-uploaded files.
• Attack Vector:
  • The endpoint is exposed to unauthenticated users, meaning anyone (even without an account) can send specially crafted requests to this function.
  • File upload capability is not restricted—attackers can upload any file type, including PHP scripts (webshells).
• Root Cause:
  • The lack of validation in the upload process:
    • No checks on file extension or MIME type.
    • No user rights/role verification on the function call.
    • Uploaded files are saved in a web-accessible directory.

Exploitation

Step-by-Step Exploitation Example:

1. Reconnaissance: The attacker identifies a website running the vulnerable Alone theme (<=7.8.3).
2. Craft Malicious Payload: A PHP webshell or other malicious script is created.
3. Send Payload: The attacker makes a POST request to the endpoint exposed by alone_import_pack_install_plugin(), attaching the malicious file.
   • No credentials required; any visitor can trigger this upload.
   • Example tool: curl or a simple Python script to automate the upload.
4. File Deployment: Since the function lacks validation, the malicious file is uploaded directly to the server.
5. Remote Code Execution: The attacker accesses the uploaded webshell via its URL and executes arbitrary commands, gaining full control over the WordPress instance and its hosting environment.

Real-World Impact

• The flaw has been actively exploited since at least July 12, 2025 with over 120,900 real-world attempts detected.
• Potential consequences:
  • Full website takeover (admin rights or total file system access).
  • Data theft or destruction.
  • Deployment of phishing pages, malware, or addition of the site to broader attack campaigns.

Mitigation

• Upgrade Immediately: Users are urged to update to version 7.8.4 or later, which fixes the authentication and validation issues in the affected function.
• Incident Response:
  • Inspect logs for suspicious POST requests to the vulnerable endpoint.
  • Check the webroot and uploads directory for unfamiliar files.
  • Reset WordPress and hosting credentials after cleanup.

Note: Red Hat confirmed that none of its products are affected by this theme vulnerability.

Immediate action is essential to prevent site compromise and broader attacks leveraging this flaw.