Cross Site Scripting Vulnerability in SourceCodester Class and Exam Timetabling System
CVE-2026-16203

5.1MEDIUM

Key Information:

Vendor

Sourcecodester
Status
Class And Exam Timetabling System
Vendor
CVE Published:
19 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-16203?

A vulnerability exists in the SourceCodester Class and Exam Timetabling System version 1.0, specifically within the functionality of the file /forCYS.php. This issue allows an attacker to manipulate the 'course' argument, facilitating cross-site scripting (XSS) attacks. The exploit is publicly accessible, enabling remote execution and raising significant security concerns for users of this system.

Affected Version(s)

Class and Exam Timetabling System 1.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-16203 - Proof of Concept

References

https://vuldb.com/vuln/380019
vdb-entrytechnical-description
https://vuldb.com/vuln/380019/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-16203
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

AlbaDove (VulDB User)
.