TI-2026-23545 Aliases CVE-2026-30523 GHSA-5gjp-7788-qpxg

A Business Logic vulnerability exists in SourceCodester Loan Management System v1.0 due…

MEDIUM 62CWE-20Published 2026-04-01 · Updated 2026-04-01

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00314 24th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:oretnom23:loan_management_system:1.0:::::::*	1.0	Vulnerable	oretnom23

cpe:2.3:a:oretnom23:loan_management_system:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·oretnom23

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-30523
2026-10-03 Alias added: GHSA-5gjp-7788-qpxg

References

Exploit 1

https://github.com/meifukun/Web-Security-PoCs/blob/main/Loan-Management-System/BusinessLogic-LoanPlan-NegativeMonths.md

TI-2026-23544 A Business Logic vulnerability exists in SourceCodester Loan Management System v1.0 due… CVSS 3.1MEDIUM 6.5
TI-2026-23543 A Business Logic vulnerability exists in SourceCodester Loan Management System v1.0 due… CVSS 3.1MEDIUM 6.5
TI-2026-03194 SourceCodester Loan Management System index.php cross site scripting CVSS 4.0MEDIUM 5.3
TI-2026-23542 A Blind SQL Injection vulnerability exists in SourceCodester Loan Management System v1.0. CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences