CVE-2020-15178 : Security Advisory and Response

In PrestaShop contactform module (prestashop/contactform) before version 4.3.0, an attacker can inject JavaScript through the contact form, potentially executing arbitrary code in a victim's browser.

Understanding CVE-2020-15178

What is CVE-2020-15178?

This CVE identifies a potential Cross-site Scripting (XSS) vulnerability in the PrestaShop contactform module.

The Impact of CVE-2020-15178

The vulnerability allows attackers to inject JavaScript code through the contact form, posing a risk of executing arbitrary code in a victim's browser.

Technical Details of CVE-2020-15178

Vulnerability Description

The

message

field in the contactform module was incorrectly unescaped, enabling attackers to inject malicious JavaScript.

Affected Systems and Versions

Product: contactform
Vendor: PrestaShop
Versions Affected: < 4.3.0

Exploitation Mechanism

Attack Complexity: HIGH
Attack Vector: NETWORK
Privileges Required: NONE
User Interaction: REQUIRED
Scope: CHANGED
CVSS Score: 8 (High)

Mitigation and Prevention

Immediate Steps to Take

Update the contactform module to version 4.3.0 or higher.
Implement input validation and output encoding to prevent XSS attacks.

Long-Term Security Practices

Regularly monitor and update all modules and extensions.
Educate users on safe browsing practices and recognizing phishing attempts.

Patching and Updates

Apply security patches promptly to address known vulnerabilities.