Code-Projects Exam Form Submission Cross-Site Scripting Vulnerability

A cross-site scripting (XSS) vulnerability has been identified in Code-Projects Exam Form Submission version 1.0. The issue resides in the file '/admin/update_s3.php', where the 'sname' parameter is not properly validated or encoded before being output to users. This flaw allows attackers to inject and execute malicious scripts in the context of the victim's browser, potentially leading to the theft of cookies, session tokens, or other sensitive information. The vulnerability can be exploited remotely without requiring authentication or user interaction.

Impact

Exploitation of this vulnerability allows for cross-site scripting, where injected scripts are executed in the context of the user's browser.

Reproduction

To reproduce this vulnerability, send a request to '/admin/update_s3.php' with a crafted 'sname' parameter that includes a script tag. The injected script will be executed in the browser, demonstrating the cross-site scripting vulnerability.

Remediation

It is recommended to encode user input before outputting it to the web page, validate and filter user input to reject or escape potentially malicious content, implement a strict Content Security Policy, set secure and HttpOnly flags for sensitive cookies, and conduct regular security audits.