Cross-Site Scripting Vulnerability in Symfony Debug Handler

CVE-2017-18343

What is CVE-2017-18343?

The Symfony Debug Handler has a cross-site scripting (XSS) vulnerability that can be exploited through an improperly sanitized array key during the exception pretty printing process in the ExceptionHandler.php file. This vulnerability affects specific versions of the Symfony framework, potentially exposing sensitive data when the debug tools are improperly used in production environments. It's important to note that while the vendor maintains that these debugging tools are not meant for production use, developers who utilize them may still face risks from this type of XSS vulnerability.

References