CVE-2020-27481 Explained : Impact and Mitigation

An unauthenticated SQL Injection vulnerability in Good Layers LMS Plugin <= 2.1.4 allows unauthorized access to sensitive data.

Understanding CVE-2020-27481

This CVE identifies a security flaw in the Good Layers LMS Plugin that can be exploited through unauthenticated SQL Injection.

What is CVE-2020-27481?

The vulnerability arises from the improper handling of user input in a WordPress function, enabling unauthenticated users to execute SQL queries.

The Impact of CVE-2020-27481

The vulnerability permits unauthorized users to manipulate SQL queries, potentially leading to data theft, modification, or deletion.

Technical Details of CVE-2020-27481

The following technical aspects provide insight into the nature of the vulnerability.

Vulnerability Description

The issue stems from the use of "wp_ajax_nopriv" in WordPress, allowing unauthenticated users to exploit the "gdlr_lms_cancel_booking" function with unsanitized input.

Affected Systems and Versions

Product: Good Layers LMS Plugin
Vendor: Good Layers
Versions: <= 2.1.4

Exploitation Mechanism

Unauthenticated users can access the vulnerable function "gdlr_lms_cancel_booking" and inject SQL queries via the "id" POST parameter.

Mitigation and Prevention

Protecting systems from CVE-2020-27481 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable or remove the vulnerable plugin version.
Implement input validation and sanitization in WordPress functions.
Monitor for any unauthorized access or suspicious activities.

Long-Term Security Practices

Regularly update plugins and software to patch known vulnerabilities.
Conduct security audits to identify and address potential weaknesses.
Educate users on secure coding practices and the risks of SQL Injection.

Patching and Updates

Check for security patches or updates from the plugin vendor.
Apply patches promptly to mitigate the SQL Injection risk.