CVE-2021-42664 : Exploit Details and Defense Strategies

A Stored Cross Site Scripting (XSS) Vulnerability exists in Sourcecodester Engineers Online Portal in PHP via the Quiz title and quiz description parameters to add_quiz.php. An attacker can leverage this vulnerability to run JavaScript commands on the web server visitor's behalf, potentially leading to cookie stealing and more.

Understanding CVE-2021-42664

This CVE involves a Stored Cross Site Scripting (XSS) vulnerability in the Sourcecodester Engineers Online Portal in PHP, enabling attackers to execute malicious JavaScript commands on visitors' browsers.

What is CVE-2021-42664?

This CVE identifies a security flaw in Sourcecodester Engineers Online Portal in PHP, allowing unauthorized individuals to inject and execute harmful JavaScript code on the web server visitor's browser, leading to various attacks like cookie theft.

The Impact of CVE-2021-42664

Exploitation of this vulnerability can result in severe consequences, including unauthorized execution of JavaScript commands on the victim's browser, potentially leading to sensitive information theft such as cookies.

Technical Details of CVE-2021-42664

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows attackers to execute malicious JavaScript code using the Quiz title and description parameters in the add_quiz.php file of the Sourcecodester Engineers Online Portal in PHP.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Affected Version: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious JavaScript commands in the Quiz title and description parameters, enabling them to run arbitrary code on the visitor's browser.

Mitigation and Prevention

Protective measures against this vulnerability are crucial to prevent potential attacks.

Immediate Steps to Take

Apply security patches provided by the application vendor.
Regularly monitor and sanitize user inputs to prevent XSS attacks.

Long-Term Security Practices

Implement strict input validation and output encoding mechanisms.
Educate developers and users about the risks of XSS vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Sourcecodester Engineers Online Portal.
Regularly update the application to the latest secure version.