---
id: CVE-2026-13521
title: >-
  A vulnerability was identified in SourceCodester Class and Exam Timetabling
  System 1.0/5.php
summary: >-
  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 lea…
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-74
  - CWE-89
published: '2026-06-29'
updated: '2026-06-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-13521'
references:
  - url: 'https://github.com/xiaoxuxu233/myCVE/issues/2'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-13521'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/839572'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/374529'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/374529/cti'
    label: cna@vuldb.com
  - url: 'https://www.sourcecodester.com/'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-06-29T13:42:12.320Z'
epss: 0.00431
epssPercentile: 0.34681
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.