PT-2026-29325 · Oretnom23 · Alton Management System

Meifukun · Publicado 2026-03-31 · Atualizado 2026-03-31 · CVE-2026-30521

NVD

CVSS v3.1

6.5

Média

Vetor base

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

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.

Exploit

Correção

Enumeração de Fraquezas

CWE-602

Identificadores relacionados

CVE-2026-30521

Produtos afetados

Alton Management System

Referências · 2

• 🔥 https://github.com/meifukun/Web-Security-PoCs/blob/main/Loan-Management-System/BusinessLogic-LoanPlan-NegativeInterest.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-30521 · Nota de Segurança