Medium severity6.5NVD Advisory· Published Mar 31, 2026· Updated Apr 2, 2026
CVE-2026-30521
CVE-2026-30521
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2cpe:2.3:a:oretnom23:loan_management_system:1.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:oretnom23:loan_management_system:1.0:*:*:*:*:*:*:*
- (no CPE)range: =1.0
Patches
Vulnerability mechanics
References
1- github.com/meifukun/Web-Security-PoCs/blob/main/Loan-Management-System/BusinessLogic-LoanPlan-NegativeInterest.mdnvdExploitThird Party Advisory
News mentions
0No linked articles in our index yet.