Home/CVE/A Business Logic vulnerability exists in SourceCodester Loan Management System v1.0 due to the lack of proper input vali
CVE

CVE-2026-30523

A Business Logic vulnerability exists in SourceCodester Loan Management System v1.0 due to the lack of proper input vali

A Business Logic vulnerability exists in SourceCodester Loan Management System v1.0 due to the lack of proper input validation. The application allows administrators to define "Loan Plans" which determine the duration of a loan (in months). However, the backend fails to validate that the duration must be a positive integer.

An attacker can submit a negative value for the months parameter. The system accepts this invalid data and creates a loan plan with a negative duration.

MEDIUM · CVSS 6.5 EPSS 0.00089
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

1
oretnom23 loan management systemall versions
⚠

Public Exploits & PoCs

1
pocgithub.com · BusinessLogic-LoanPlan-NegativeMonths.mdgithub.com
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Apr 2026 · 03:22 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
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