CVE-2026-30521 — Client-Side Enforcement of Server-Side Security in Loan Management System

CWE-602 — Client-Side Enforcement of Server-Side Security3 documents3 sources
Severity
6.5MEDIUMNVD
EPSS
0.0%
top 87.52%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Oretnom23 Loan Management System
Timeline
PublishedMar 31

Description

A Business Logic vulnerability exists in SourceCodester Loan Management System v1.0 due to improper server-side validation. The application allows administrators to create "Loan Plans" with specific interest rates. While the frontend interface prevents users from entering negative numbers, this constraint is not enforced on the backend. An authenticated attacker can bypass the client-side restriction by manipulating the HTTP POST request to submit a negative value for the interest_percentage. Th…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NExploitability: 2.8 | Impact: 3.6

Affected Packages1 packages

🔴Vulnerability Details

2
GHSA
GHSA-pmwx-37w8-6v99: A Business Logic vulnerability exists in SourceCodester Loan Management System v1↗2026-03-31
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CVEList
CVE-2026-30521: A Business Logic vulnerability exists in SourceCodester Loan Management System v1↗2026-03-31
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CVE-2026-30521 — Loan Management System vulnerability | cvebase