CVE-2026-30521
Quick assessment
Affected
n/a n/a
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
SourceCodester Loan Management System是SourceCodester开源的一个贷款管理系统。 SourceCodester Loan Management System 1.0版本存在安全漏洞，该漏洞源于业务逻辑存在缺陷，服务器端验证不当，可能导致创建负利率贷款计划。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-30521
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
SourceCodester Loan Management System 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SourceCodester Loan Management System是SourceCodester开源的一个贷款管理系统。 SourceCodester Loan Management System 1.0版本存在安全漏洞，该漏洞源于业务逻辑存在缺陷，服务器端验证不当，可能导致创建负利率贷款计划。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | n/a | n/a | - |
|
II. Public POCs for CVE-2026-30521
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Proof of Concept for CVE-2026-30521 (1)
Same Patch Batch · n/a · 2026-03-31 · 22 CVEs total
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| CVE-2026-30278 | FLY is FUN Aviation Navigation 安全漏洞 | |
| CVE-2026-30277 | TA Triumph-Adler TA/UTAX Mobile Print 安全漏洞 | |
| CVE-2026-30279 | Squareapps My Location Travel Timeline 安全漏洞 | |
| CVE-2026-30284 | App Craze Voice Recorder 安全漏洞 | |
| CVE-2026-29870 | Agentic Context Engine 安全漏洞 | |
| CVE-2026-30312 | Cline 安全漏洞 | |
| CVE-2026-30282 | UXGROUP Cast to TV Screen Mirroring 安全漏洞 | |
| CVE-2026-30310 | Sixth 安全漏洞 | |
| CVE-2026-30285 | Zora 安全漏洞 | |
| CVE-2026-30314 | Ridvay Code 安全漏洞 | |
| CVE-2026-30520 | SourceCodester Loan Management System 安全漏洞 | |
| CVE-2026-30283 | PEAKSEL Animal Sounds and Ringtones 安全漏洞 | |
| CVE-2026-30311 | Ridvay Code 安全漏洞 |
Showing top 20 of 22 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-30521
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