CVE-2026-16203
Received Received - Intake

Cross-Site Scripting in Class and Exam Timetabling System

Publication date: 2026-07-19

Last updated on: 2026-07-19

Assigner: VulDB

Description
A vulnerability was identified in SourceCodester Class and Exam Timetabling System 1.0. Affected by this issue is some unknown functionality of the file /forCYS.php. Such manipulation of the argument course leads to cross site scripting. The attack may be performed from remote. The exploit is publicly available and might be used.

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Meta Information

Published
2026-07-19
Last Modified
2026-07-19
Generated
2026-07-19
AI Q&A
2026-07-19
EPSS Evaluated
N/A
NVD
CVE-2026-16203
EUVD
EUVD-2026-45414

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
sourcecodester class_and_exam_timetabling_system 1.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

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Executive Summary

This vulnerability is a Cross-Site Scripting (XSS) flaw in the Class and Exam Timetabling System 1.0. It exists in the /forCYS.php file where user input from the 'course' parameter is directly output without proper encoding or filtering. This allows attackers to inject malicious scripts that execute in a victim's browser.

Detection Guidance

To detect this XSS vulnerability, inspect the /forCYS.php file for improper handling of the 'course' parameter. Test by sending a payload like <script>prompt(/xss/);</script> in the course parameter via a browser or tools like curl. Check if the script executes in the response. Use browser developer tools to inspect network requests and responses for unsanitized input.

Impact Analysis

An attacker could exploit this to steal cookies, session tokens, or sensitive data from users. They might also perform unauthorized actions, deface web pages, or redirect users to malicious sites. The attack can be launched remotely without requiring login or authorization.

Compliance Impact

This XSS vulnerability could lead to unauthorized data access or disclosure, violating GDPR's data protection principles and HIPAA's security requirements for safeguarding sensitive information. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Immediately apply output encoding to the 'course' parameter in /forCYS.php to prevent script injection. Implement input validation to restrict the 'course' parameter to expected values. Add a Content Security Policy (CSP) header to mitigate XSS impact. Set secure and HttpOnly flags for cookies to protect session data. Regularly audit the application for similar issues.

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