CVE-2026-30523 — MEDIUM (6.5)

Vulnerability 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.

CVSS Score

6.5

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Oretnom23	Loan Management System	1.0

Related Weaknesses (CWE)

CWE-20

References

https://github.com/meifukun/Web-Security-PoCs/blob/main/Loan-Management-System/BExploitThird Party Advisory

FAQ

What is CVE-2026-30523?

CVE-2026-30523 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 deter...

How severe is CVE-2026-30523?

CVE-2026-30523 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-30523?

Check the references section above for vendor advisories and patch information. Affected products include: Oretnom23 Loan Management System.