A Business Logic vulnerability exists in SourceCodester Loan Management System v1.0 due to improper server-side validation. The application allows administrators to create "Loan Plans" with specific penalty rates for overdue payments. While the frontend interface prevents users from entering negative numbers in the "Monthly Overdue Penalty" field, this constraint is not enforced on the backend. An authenticated attacker can bypass the client-side restriction by manipulating the HTTP POST request to submit a negative value for the penalty_rate.
References
| Link | Resource |
|---|---|
| https://github.com/meifukun/Web-Security-PoCs/blob/main/Loan-Management-System/BusinessLogic-LoanPlan-NegativePenalty.md | Exploit Third Party Advisory |
Configurations
History
01 Apr 2026, 18:44
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:oretnom23:loan_management_system:1.0:*:*:*:*:*:*:* | |
| First Time |
Oretnom23 loan Management System
Oretnom23 |
|
| References | () https://github.com/meifukun/Web-Security-PoCs/blob/main/Loan-Management-System/BusinessLogic-LoanPlan-NegativePenalty.md - Exploit, Third Party Advisory |
01 Apr 2026, 16:23
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 6.5 |
| CWE | CWE-602 |
01 Apr 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-01 14:16
Updated : 2026-04-01 18:44
NVD link : CVE-2026-30522
Mitre link : CVE-2026-30522
CVE.ORG link : CVE-2026-30522
JSON object : View
Products Affected
oretnom23
- loan_management_system
CWE
CWE-602
Client-Side Enforcement of Server-Side Security