CVE-2026-30521
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. This results in the creation of loan plans with negative interest rates.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-30521?
CVE-2026-30521 is considered a medium severity vulnerability due to improper server-side validation.
How do I fix CVE-2026-30521?
To fix CVE-2026-30521, implement proper server-side validation to restrict the creation of loan plans with negative interest rates.
What impact does CVE-2026-30521 have on the Loan Management System?
CVE-2026-30521 allows unauthorized financial manipulation by permitting administrators to set incorrect interest rates.
Who is affected by CVE-2026-30521?
CVE-2026-30521 affects users of SourceCodester Loan Management System version 1.0, particularly administrators.
Is there a patch available for CVE-2026-30521?
As of now, there is no official patch announced for CVE-2026-30521, but mitigations can be implemented through validation updates.