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Class Timetabling System CVE-2026-13566

| EUVDEUVD-2026-40077 MEDIUM
SQL Injection (CWE-89)
2026-06-29 VulDB GHSA-9p45-w3r5-c7w8
SQLi PHP Class And Exam Timetabling System
5.5
CVSS 4.0 · Vendor: VulDB
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Severity by source

Vendor (VulDB) PRIMARY
5.5 MEDIUM
CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
8.2 HIGH

Unauthenticated network SQLi enables full database read (C:H) and partial data write (I:L); no availability impact expected from read-biased injection against a PHP timetabling app.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
Jun 29, 2026 - 14:29 vuln.today
CVSS changed
Jun 29, 2026 - 14:22 NVD
6.9 (MEDIUM) 5.5 (MEDIUM)

DescriptionCVE.org

A vulnerability was identified in SourceCodester Class and Exam Timetabling System 1.0. Affected by this issue is some unknown functionality of the file /preview3.php. The manipulation of the argument course_year_section leads to sql injection. The attack may be initiated remotely. The exploit is publicly available and might be used.

AnalysisAI

Unauthenticated SQL injection in SourceCodester Class and Exam Timetabling System 1.0 exposes backend database contents via the course_year_section parameter in /preview3.php. The CVSS 4.0 vector confirms network-accessible, no-authentication, no-interaction exploitation (AV:N/AC:L/PR:N/UI:N), and exploit code is publicly available (E:P on GitHub). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify exposed /preview3.php endpoint
Delivery
Send crafted HTTP request with SQL payload in course_year_section
Exploit
Trigger unsanitized SQL query execution
Execution
Extract database schema and table contents
Impact
Retrieve sensitive records or credentials
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the `/preview3.php` endpoint be network-reachable by the attacker - no authentication is required per the CVSS 4.0 vector (PR:N/UI:N). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 5.5 (Medium) reflects low partial impact across confidentiality, integrity, and availability (VC:L/VI:L/VA:L) with no scope change to subsequent systems. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with network access to the web application sends a crafted HTTP GET or POST request to `/preview3.php` with a SQL payload injected into the `course_year_section` parameter (e.g., `course_year_section=1' UNION SELECT table_name,2,3 FROM information_schema.tables-- -`), causing the backend database to return schema or data rows in the application response. A publicly available proof-of-concept on GitHub (https://github.com/Pluto2362/CVE-2026/issues/2) provides ready-made payloads, meaning exploitation requires no specialized knowledge. …
Remediation No vendor-released patch has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-13566 vulnerability details – vuln.today
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