CVE-2026-13521Public exploitNetwork attack vector

Unauthenticated database manipulation via course_year_section SQL injection

Published Jun 29, 2026 · Updated Jun 29, 2026

SQL injection in SourceCodester Class and Exam Timetabling System 1.0 and 5.php allows remote attackers to execute arbitrary SQL via crafted requests. The preview5.php handler places the POST course_year_section value directly into an SQL query without validation or parameter binding. No login is required; the public proof of concept supplies boolean-, error-, time-, and UNION-based payloads that manipulate the database query.

CVSS severity7.3
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in SourceCodester Class and Exam Timetabling System 1.0 and 5.php allows remote attackers to execute arbitrary SQL via crafted requests. The preview5.php handler places the POST course_year_section value directly into an SQL query without validation or parameter binding. No login is required; the public proof of concept supplies boolean-, error-, time-, and UNION-based payloads that manipulate the database query.

The record

CVE
CVE-2026-13521
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
Online Computer and Laptop Store Project
Product
Class and Exam Timetabling System
Classifications
CWE-89, CWE-74, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0
  2. Affected versionversion=5.php

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Online Computer and Laptop Store Project · Class and Exam Timetabling Systemversion=1.0; version=5.php

Published CVSS scores

5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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