CVE-2026-30523

medium

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

Vendor / product: Oretnom23 — loan management system

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.

CVSS

6.5

6.5 (CVSS v3.1)

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

Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)

Timeline (UTC)

Published: 2026-04-01 15:22

Modified: 2026-11-11 19:10

NVD status: Analyzed

Last synced 7 hours ago

Verified against the source API 2026-11-11 19:10 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

oretnom23 / loan_management_system 1.0

Weakness classification (CWE)

CWE-20

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

No vendor advisory or patch reference tagged by NVD. Check the references below.

References

https://github.com/meifukun/Web-Security-PoCs/blob/main/Loan-Management-System/BusinessLog... cve@mitre.org

Data sources

NVD CVE API 2.0 — fetched 2026-11-11 19:10 UTC · record ↗

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CVE-2026-30523

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Weakness classification (CWE)

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References

Data sources

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