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 interest rates. While the frontend interface prevents users from entering negative numbers, 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 interest_percentage. This results in the creation of loan plans with negative interest rates.
References
| Link | Resource |
|---|---|
| https://github.com/meifukun/Web-Security-PoCs/blob/main/Loan-Management-System/BusinessLogic-LoanPlan-NegativeInterest.md | Exploit Third Party Advisory |
Configurations
History
02 Apr 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-602 |
01 Apr 2026, 20:41
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Oretnom23 loan Management System
Oretnom23 |
|
| References | () https://github.com/meifukun/Web-Security-PoCs/blob/main/Loan-Management-System/BusinessLogic-LoanPlan-NegativeInterest.md - Exploit, Third Party Advisory | |
| CWE | NVD-CWE-noinfo | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 6.5 |
| CPE | cpe:2.3:a:oretnom23:loan_management_system:1.0:*:*:*:*:*:*:* |
31 Mar 2026, 19:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-03-31 19:16
Updated : 2026-04-02 15:16
NVD link : CVE-2026-30521
Mitre link : CVE-2026-30521
CVE.ORG link : CVE-2026-30521
JSON object : View
Products Affected
oretnom23
- loan_management_system
CWE