CVE-2026-30523
Medium
Description
A Business Logic vulnerability exists in SourceCodester Loan Management System v1.0 due to the lack of proper input validation. The application allows administrators to define "Loan Plans" which determine the duration of a loan (in months). However, the backend fails to validate that the duration must be a positive integer. An attacker can submit a negative value for the months parameter. The system accepts this invalid data and creates a loan plan with a negative duration.
SeverityMedium
CVSS6.5
Exploit probability—
ProductOretnom23 Loan Management System
PublishedApr 1, 2026
First seenApr 1, 2026
Weakness typeCWE-20Improper input validation
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| oretnom23 loan_management_system | 1.0 | — |
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