Cross-Site Scripting Vulnerability in SourceCodester Class and Exam Timetabling System
CVE-2026-16155

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-2026-16155?

A cross-site scripting vulnerability exists in the SourceCodester Class and Exam Timetabling System, specifically within the '/schoolyr.php' file. This vulnerability allows attackers to manipulate the argument 'sy' to inject malicious scripts that can be executed in the user's browser. The attack can be initiated remotely, making it a significant risk for users of the affected system. Exploits are publicly available, heightening the necessity for immediate remediation to protect against potential attacks.

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-2026-16155 - Proof of Concept

References

https://vuldb.com/vuln/379920
vdb-entrytechnical-description
https://vuldb.com/vuln/379920/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-16155
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)
.