CVE-2019-25138 : Security Advisory and Response

CVE-2019-25138 is a critical vulnerability found in the User Submitted Posts plugin for WordPress, allowing unauthenticated attackers to upload arbitrary files, potentially leading to remote code execution.

Understanding CVE-2019-25138

This CVE identifies a security flaw in the User Submitted Posts plugin for WordPress, enabling unauthorized file uploads on the server.

What is CVE-2019-25138?

The vulnerability in the User Submitted Posts plugin allows attackers to upload any files to the server due to missing file type validation in the usp_check_images function.

The Impact of CVE-2019-25138

Exploiting this vulnerability could result in remote code execution, posing a severe threat to the affected WordPress sites.

Technical Details of CVE-2019-25138

This section provides detailed technical information about the CVE-2019-25138 vulnerability.

Vulnerability Description

The vulnerability arises from inadequate file type validation in the usp_check_images function within versions up to and including 20190312 of the User Submitted Posts plugin.

Affected Systems and Versions

Vendor: specialk
Product: User Submitted Posts – Enable Users to Submit Posts from the Front End
Versions affected: up to and including 20190312

Exploitation Mechanism

Attackers can exploit this vulnerability to upload malicious files to the server, potentially leading to remote code execution.

Mitigation and Prevention

Protect your WordPress site from CVE-2019-25138 with the following steps:

Immediate Steps to Take

Disable or remove the User Submitted Posts plugin if not essential
Update the plugin to a patched version
Monitor server logs for suspicious activities

Long-Term Security Practices

Regularly update all plugins and themes
Implement strong access controls and user authentication mechanisms
Conduct security audits and penetration testing

Patching and Updates

Ensure the User Submitted Posts plugin is updated to a version beyond 20190426 to mitigate the vulnerability.