SQL Injection Vulnerability in SourceCodester Class and Exam Timetabling System
CVE-2026-13521

6.9MEDIUM

Key Information:

Vendor

Sourcecodester
Status
Class And Exam Timetabling System
Vendor
CVE Published:
29 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13521?

A SQL injection vulnerability has been detected in the SourceCodester Class and Exam Timetabling System, specifically within the /preview5.php file. This vulnerability stems from improper handling of the 'course_year_section' argument, allowing remote attackers to manipulate SQL queries. As a result, unauthorized access to sensitive database information may occur. The exploit for this vulnerability is publicly available, highlighting the necessity for immediate remediation to secure affected systems.

Affected Version(s)

Class and Exam Timetabling System 1.0

Class and Exam Timetabling System 5.php

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-2026-13521 - Proof of Concept

References

https://vuldb.com/vuln/374529
vdb-entrytechnical-description
https://vuldb.com/vuln/374529/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13521
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

L4ne (VulDB User)
.