CVE-2021-41120 : What You Need to Know

Sylius/PayPalPlugin versions before 1.2.4 and 1.3.1 allow unauthorized access to sensitive credit card information.

Understanding CVE-2021-41120

Sylius/PayPalPlugin was susceptible to unauthorized access due to a predictable URL in the credit card form, leading to exposure of personal information.

What is CVE-2021-41120?

The vulnerability in Sylius/PayPalPlugin allowed unauthenticated users to access credit card details, posing a risk of exposing customers' sensitive information.

The Impact of CVE-2021-41120

The vulnerability had a CVSS base score of 7.5, signifying a high severity issue. It could result in unauthorized exposure of high-confidentiality data without the need for user interaction.

Technical Details of CVE-2021-41120

Sylius/PayPalPlugin's flaw stemmed from the generation of a predictable payment page URL, facilitating unauthorized access to credit card details.

Vulnerability Description

The credit card form in affected versions prefilled customers' names, potentially leading to personally identifiable information exposure. Authentication was not required, and the issue was resolved in versions 1.2.4 and 1.3.1.

Affected Systems and Versions

Product: PayPalPlugin
Vendor: Sylius
Versions Affected: >= 1.0.0, < 1.2.4 and >= 1.3.0, < 1.3.1

Exploitation Mechanism

The vulnerability allowed unauthorized individuals to easily predict the URL (/pay-with-paypal/{id}) for the payment page, leading to exposure of sensitive credit card information.

Mitigation and Prevention

Immediate action and long-term security practices are crucial to safeguard against unauthorized access and exposure of sensitive data.

Immediate Steps to Take

Update Sylius/PayPalPlugin to versions 1.2.4 or 1.3.1 to mitigate the vulnerability.
Implement custom repository methods and override specific routes and services if updates are not feasible.

Long-Term Security Practices

Regularly monitor and audit access to sensitive information.
Follow secure coding practices to prevent predictable URL generation.

Patching and Updates

Ensure timely installation of security patches and updates to address known vulnerabilities.