CVE-2026-30522

MEDIUM

6.5

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 penalty rates for overdue payments. While the frontend interface prevents users from entering negative numbers in the "Monthly Overdue Penalty" field, 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 penalty_rate.

Details CVE

Score CVSS v3.16.5

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie4/1/2026

Derniere modification4/1/2026

Sourcenvd

Observations honeypot0

Produits affectes

oretnom23:loan_management_system

Faiblesses (CWE)

CWE-602

References

https://github.com/meifukun/Web-Security-PoCs/blob/main/Loan-Management-System/BusinessLogic-LoanPlan-NegativePenalty.md(cve@mitre.org)

Correlations IOC

Aucune correlation enregistree

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