CVE-2026-30523 — Improper Input Validation in Loan Management System

CWE-20 — Improper Input Validation3 documents3 sources
Severity
6.5MEDIUMNVD
EPSS
0.1%
top 81.20%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Oretnom23 Loan Management System
Timeline
PublishedApr 1

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 vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:HExploitability: 1.2 | Impact: 5.2

Affected Packages1 packages

🔴Vulnerability Details

2
CVEList
CVE-2026-30523: A Business Logic vulnerability exists in SourceCodester Loan Management System v1↗2026-04-01
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GHSA
GHSA-5gjp-7788-qpxg: A Business Logic vulnerability exists in SourceCodester Loan Management System v1↗2026-04-01
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CVE-2026-30523 — Improper Input Validation | cvebase