EUVD-2026-17583
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Lifecycle Timeline
4Description
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.
Analysis
SourceCodester Loan Management System v1.0 allows authenticated administrators to create loan plans with negative interest rates by submitting negative values in HTTP POST requests, bypassing client-side validation that lacks server-side enforcement. This business logic vulnerability enables attackers with administrative credentials to manipulate loan terms and potentially cause financial harm to the organization. …
Sign in for full analysis, threat intelligence, and remediation guidance.
Priority Score
Share
External POC / Exploit Code
Leaving vuln.today