Cross-Site Scripting Vulnerability in SourceCodester Class and Exam Timetabling System
CVE-2026-16156

5.1MEDIUM

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-16156?

A security flaw has been identified in the SourceCodester Class and Exam Timetabling System version 1.0, specifically in the file forexam.php. By manipulating the 'day' argument, attackers can execute cross-site scripting attacks, which may allow them to inject malicious scripts into web pages viewed by other users. This vulnerability is critical as it can be exploited remotely, enabling unauthorized access to sensitive data and a potential compromise of user sessions.

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-2026-16156 - Proof of Concept

References

https://vuldb.com/vuln/379921
vdb-entrytechnical-description
https://vuldb.com/vuln/379921/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-16156
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

justconter (VulDB User)
.