CVE-2020-15159 : Exploit Details and Defense Strategies

baserCMS 4.3.6 and earlier versions are affected by Cross Site Scripting (XSS) and Remote Code Execution (RCE) vulnerabilities. This can be exploited by uploading malicious scripts as a system administrator, leading to potential security risks.

Understanding CVE-2020-15159

baserCMS version 4.3.6 and below are susceptible to Cross Site Scripting (XSS) and Remote Code Execution (RCE) attacks.

What is CVE-2020-15159?

CVE-2020-15159 is a security vulnerability in baserCMS versions prior to 4.3.7 that allows attackers to execute XSS and RCE attacks by uploading malicious script files.

The Impact of CVE-2020-15159

The vulnerability poses a high risk with a CVSS base score of 7.6, affecting confidentiality, integrity, and availability of the system. Attackers can exploit this to execute arbitrary code and compromise the system.

Technical Details of CVE-2020-15159

baserCMS 4.3.6 and earlier versions are vulnerable to XSS and RCE attacks.

Vulnerability Description

The vulnerability allows attackers to perform XSS and RCE attacks by uploading malicious scripts, potentially leading to unauthorized access and data breaches.

Affected Systems and Versions

Product: basercms
Vendor: baserproject
Versions Affected: < 4.3.7

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Network
Privileges Required: High
User Interaction: Required
Scope: Changed
Exploitation may require the attacker to log in as a system administrator and upload an executable script file.

Mitigation and Prevention

Immediate action is crucial to mitigate the risks associated with CVE-2020-15159.

Immediate Steps to Take

Update baserCMS to version 4.3.7 or later to patch the vulnerabilities.
Avoid uploading untrusted files to the system.
Monitor system logs for any suspicious activities.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement secure coding practices to mitigate XSS and RCE risks.

Patching and Updates

Apply security patches and updates provided by baserproject to address the vulnerabilities.