Cross-Site Scripting Vulnerability in SourceCodester Class and Exam Timetabling System
CVE-2026-78054

5.3MEDIUM

Key Information:

Vendor

Sourcecodester
Status
Class And Exam Timetabling System
Vendor
CVE Published:
23 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-78054?

A security flaw has been detected in the SourceCodester Class and Exam Timetabling System version 1.0. This vulnerability resides in the BSIS1.php file, where an improper handling of the 'course' argument allows for cross-site scripting (XSS) attacks. Malicious users can exploit this weakness remotely, potentially leading to unauthorized actions or data theft. The exploit is publicly available, raising concerns for all users of the affected software. It is crucial for administrators to apply necessary security measures to mitigate the risks associated with this vulnerability.

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-2026-78054 - Proof of Concept

References

https://vuldb.com/vuln/394295
vdb-entrytechnical-description
https://vuldb.com/vuln/394295/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-78054
third-party-advisory

CVSS V4

Score:
5.3
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

i-OvO-i (VulDB User)
.