CVE-2026-30521
A Business Logic vulnerability exists in SourceCodester Loan Management System v1.0 due to improper server-side validation.
Published Mar 31, 2026 · updated Jul 24, 2026 · oretnom23 loan management system
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.
Code
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No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Mar 31, 2026 · NIST NVD
Detected
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 restrict
Jul 24, 2026 · NIST NVD
Updated
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 restrict
Affected
- cpe oretnom23/loan management system1.0
Sources
- CVE.orgVulnerability recordCVE-2026-30521
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-30521
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 negativ
nvd.nist.gov