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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| n/a | n/a | affected |
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Workaround
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References
History
Tue, 31 Mar 2026 18:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. This results in the creation of loan plans with negative interest rates. | |
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MITRE
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-03-31T18:07:33.773Z
Reserved: 2026-03-04T00:00:00.000Z
Link: CVE-2026-30521
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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Weaknesses
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