CVE-2026-30521 Business logic in n/a
An authenticated attacker can create loan plans with negative interest rates by bypassing client-side validation, impacting financial data integrity.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-30521?
CVE-2026-30521 is a medium-severity vulnerability in n/a, published on 31 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-602
Which versions are affected by CVE-2026-30521?
It affects 1 product.
Products include Oretnom23 Loan Management System.
How do I fix CVE-2026-30521?
No fix has been published for CVE-2026-30521 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-30521 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-30521 exists.
Other vulnerabilities in n/a
Sources
Also known as GHSA-pmwx-37w8-6v99.