CVE-2023-6634: Command Injection Vulnerability in LearnPress WordPress Plugin

Overview

In the ever-evolving landscape of cybersecurity, it’s important to stay informed about the latest vulnerabilities that might affect your digital infrastructure. One such vulnerability, tagged as CVE-2023-6634, has been identified in the LearnPress plugin for WordPress. This vulnerability potentially impacts any WordPress website using versions up to and including 4.2.5.7 of the LearnPress plugin. The severity of this issue is underlined by its ability to allow unauthenticated attackers to execute any public function with one parameter, potentially leading to remote code execution.

Vulnerability Summary

CVE ID: CVE-2023-6634
Severity: High (CVSS: 8.1)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

LearnPress WordPress Plugin | Up to and including 4.2.5.7

How the Exploit Works

The root cause of the vulnerability lies in the LearnPress plugin’s use of the call_user_func function with user input. This function is used in the get_content function, creating a potential for command injection. With this vulnerability, an unauthenticated attacker can execute any public function with one parameter. This can pose significant risk as it could allow an attacker to execute arbitrary code on the host system, potentially leading to system compromise or data leakage.

Conceptual Example Code

Here is an example of how the vulnerability might be exploited:

POST /wp-admin/admin-ajax.php?action=lp_ajax_get_question_content HTTP/1.1
Host: targetsite.com
Content-Type: application/x-www-form-urlencoded
question_id=<id>&type=<malicious_payload>

In the above pseudocode, `` represents the question ID and `` is a payload that calls a function with harmful effects.

Recommended Mitigation

The best course of action to address this vulnerability is to apply the vendor patch. If for some reason the patch cannot be applied immediately, utilizing a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as temporary mitigation. These systems should be configured to detect and block attempts to exploit this vulnerability until the patch is applied. It is essential to stay updated with the latest information from the vendor and apply patches as soon as they become available to prevent potential system compromise or data leakage.