CVE-2021-39339 : Exploit Details and Defense Strategies

The Telefication WordPress plugin up to version 1.8.0 is vulnerable to Open Proxy and Server-Side Request Forgery leading to security risks.

Understanding CVE-2021-39339

This CVE involves a vulnerability in the Telefication WordPress plugin, allowing Open Proxy and Server-Side Request Forgery.

What is CVE-2021-39339?

The Telefication WordPress plugin is susceptible to Open Proxy and Server-Side Request Forgery due to a user-supplied URL request value in the ~/bypass.php file.

The Impact of CVE-2021-39339

The vulnerability has a CVSS base score of 5.8 (Medium severity) and affects versions up to 1.8.0 in Telefication, potentially leading to security breaches.

Technical Details of CVE-2021-39339

This section provides in-depth technical information about the CVE.

Vulnerability Description

The vulnerability allows attackers to exploit a user-supplied URL request value via curl requests, leading to Open Proxy and Server-Side Request Forgery.

Affected Systems and Versions

Product: Telefication
Vendor: Telefication
Vulnerable Version: 1.8.0

Exploitation Mechanism

The vulnerability arises from a user-supplied URL request value that is utilized by curl requests, enabling malicious actors to perform Open Proxy and Server-Side Request Forgery attacks.

Mitigation and Prevention

Protect your system and data from CVE-2021-39339 with the following measures.

Immediate Steps to Take

Uninstall the Telefication plugin to eliminate the vulnerability.

Long-Term Security Practices

Regularly update all plugins and software to avoid known vulnerabilities.
Implement strong input validation to prevent malicious input.
Monitor and review server-side scripts for suspicious activity.

Patching and Updates

Ensure to apply security patches and updates provided by Telefication promptly.