CVE-2026-30522 | SourceCodester Loan Management System 1.0 Loan Plan penalty_rate logic error

VDB-354672 · CVE-2026-30522 · GCVE-0-2026-30522 SOURCECODESTER LOAN MANAGEMENT SYSTEM 1.0 LOAN PLAN PENALTY_RATE LOGIC ERROR HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.1 $0-$5k 1.36+ Summaryinfo A vulnerability labeled as critical has been found in SourceCodester Loan Management System 1.0. Affected is an unknown function of the component Loan Plan Handler. The manipulation of the argument penalty_rate results in logic error. This vulnerability is reported as CVE-2026-30522. The attack can be launched remotely. No exploit exists. Detailsinfo A vulnerability classified as critical has been found in SourceCodester Loan Management System 1.0. Affected is an unknown part of the component Loan Plan Handler. The manipulation of the argument penalty_rate with an unknown input leads to a logic error vulnerability. CWE is classifying the issue as CWE-840. This is going to have an impact on integrity. CVE summarizes: 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 penalty rates for overdue payments. While the frontend interface prevents users from entering negative numbers in the "Monthly Overdue Penalty" field, 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 penalty_rate. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-30522 since 03/04/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/01/2026). There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Vendor SourceCodester Name Loan Management System Version 1.0 License free Website Vendor: https://www.sourcecodester.com/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.3 VulDB Meta Temp Score: 5.1 VulDB Base Score: 5.3 VulDB Temp Score: 5.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Logic error CWE: CWE-840 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/04/2026 CVE reserved 04/01/2026 +27 days Advisory disclosed 04/01/2026 +0 days VulDB entry created 04/01/2026 +0 days VulDB entry last update Sourcesinfo Vendor: sourcecodester.com Advisory: github.com Status: Not defined CVE: CVE-2026-30522 (🔒) GCVE (CVE): GCVE-0-2026-30522 GCVE (VulDB): GCVE-100-354672 Entryinfo Created: 04/01/2026 16:59 Changes: 04/01/2026 16:59 (54) Complete: 🔍 Cache ID: 99:A24:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸