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.

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History

Wed, 01 Apr 2026 23:45:00 +0000

Type Values Removed Values Added
Description 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.
Weaknesses CWE-20
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-04-01T17:56:53.409Z

Reserved: 2026-03-04T00:00:00.000Z

Link: CVE-2026-30523

cve-icon Vulnrichment

Updated: 2026-04-01T17:56:23.867Z

cve-icon NVD

Status : Received

Published: 2026-04-01T15:22:59.170

Modified: 2026-04-01T18:16:28.987

Link: CVE-2026-30523

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses