CVE-2026-13521
Received Received - Intake

SQL Injection in Class and Exam Timetabling System

Publication date: 2026-06-29

Last updated on: 2026-06-29

Assigner: VulDB

Description
A vulnerability was identified in SourceCodester Class and Exam Timetabling System 1.0/5.php. Affected by this vulnerability is an unknown functionality of the file /preview5.php. Such manipulation of the argument course_year_section leads to sql injection. The attack may be performed from remote. The exploit is publicly available and might be used.

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Meta Information

Published
2026-06-29
Last Modified
2026-06-29
Generated
2026-06-29
AI Q&A
2026-06-29
EPSS Evaluated
N/A
NVD
CVE-2026-13521
EUVD
EUVD-2026-40018

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
sourcecodester class_and_exam_timetabling_system 1.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.
CWE-74 The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

CVE-2026-13521 is a SQL injection vulnerability found in the Class and Exam Timetabling System version 1.0, specifically in the /preview5.php file.

The vulnerability occurs due to insufficient input validation of the 'course_year_section' parameter, which allows attackers to inject malicious SQL queries remotely without needing authentication.

Impact Analysis

Exploiting this SQL injection vulnerability can lead to unauthorized access to the database, allowing attackers to tamper with data, leak sensitive information, gain control over the system, and potentially disrupt services.

Detection Guidance

This vulnerability is a SQL injection in the 'course_year_section' parameter of the /preview5.php file in SourceCodester Class and Exam Timetabling System 1.0. Detection can be performed by testing this parameter for SQL injection vulnerabilities.

  • Use automated SQL injection detection tools such as sqlmap targeting the URL with the vulnerable parameter, for example: sqlmap -u "http://target/preview5.php?course_year_section=1" --batch
  • Manually test the parameter by injecting SQL payloads such as ' OR '1'='1 or ' UNION SELECT NULL-- to observe if the application returns database errors or unexpected data.
  • Monitor network traffic for unusual or suspicious SQL query patterns targeting the 'course_year_section' parameter.
Mitigation Strategies

Immediate mitigation steps include implementing strict input validation and using prepared statements or parameterized queries to prevent SQL injection.

  • Sanitize and validate all inputs, especially the 'course_year_section' parameter, to ensure only expected data is processed.
  • Limit database user permissions to the minimum necessary to reduce the impact of a potential exploit.
  • Conduct regular security audits and code reviews to identify and fix similar vulnerabilities.
  • If possible, apply patches or updates from the software vendor addressing this vulnerability.
Compliance Impact

The SQL injection vulnerability in the Class and Exam Timetabling System allows unauthorized database access, data tampering, and sensitive information leakage. Such impacts can lead to non-compliance with data protection regulations like GDPR and HIPAA, which require safeguarding personal and sensitive data against unauthorized access and breaches.

Exploitation of this vulnerability could result in exposure or alteration of protected data, potentially violating confidentiality, integrity, and availability requirements mandated by these standards.

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