CVE-2023-46735 : What You Need to Know

This article provides detailed information about CVE-2023-46735, a vulnerability found in the Symfony PHP framework affecting versions prior to 6.3.8.

Understanding CVE-2023-46735

This CVE involves a potential Cross-site Scripting (XSS) vulnerability in Symfony's WebhookController.

What is CVE-2023-46735?

Symfony is a popular PHP framework used for web and console applications. In versions prior to 6.3.8, the error message handling in WebhookController did not properly escape user-input data, leaving it vulnerable to XSS attacks.

The Impact of CVE-2023-46735

The vulnerability could allow an attacker to inject malicious scripts into the error message response generated by WebhookController. This could lead to unauthorized access, data theft, and other malicious activities.

Technical Details of CVE-2023-46735

Symfony version 6.3.8 addressed the vulnerability by ensuring that user-submitted input is not returned in the response of WebhookController.

Vulnerability Description

The security flaw in WebhookController allowed unescaped user-input to be included in error messages, creating an XSS risk for Symfony applications.

Affected Systems and Versions

Symfony versions from 6.0.0 to 6.3.7 are affected by this CVE, with version 6.3.8 being the fixed release.

Exploitation Mechanism

Attackers could exploit this vulnerability by submitting malicious scripts through user-input fields in Symfony applications, leading to XSS attacks.

Mitigation and Prevention

To mitigate the risk associated with CVE-2023-46735, Symfony users are advised to upgrade their installations to version 6.3.8 or later.

Immediate Steps to Take

Ensure that all Symfony applications are updated to version 6.3.8 to prevent exploitation of this XSS vulnerability.

Long-Term Security Practices

Implement input validation and output encoding practices within Symfony applications to prevent XSS attacks and enhance overall security.

Patching and Updates

Stay informed about security updates and patches released by Symfony to address known vulnerabilities and ensure the safety of your applications.