CVE-2026-4889 in eLoanApp
Summary
by MITRE • 10/06/2026
SQL injection (SQLi) vulnerability in the eLoanApp application, specifically in the POST parameter 'logina' of the user process endpoint '/ajax/users.php?op=verify'. The parameter is vulnerable to boolean-based and time-based SQL injection. Successfully exploiting this vulnerability would allow an attacker to discover the platform's database engine and cause delays in database queries.
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Analysis
by VulDB Data Team • 10/06/2026
The eLoanApp application contains a critical security flaw classified as a SQL Injection (SQLi) within its user authentication workflow, specifically targeting the POST parameter logina at the endpoint /ajax/users.php?op=verify. This vulnerability stems from insufficient input validation and sanitization mechanisms when processing login credentials submitted by users attempting to verify their identity through an AJAX-based request. The absence of proper prepared statements or strict type checking allows malicious actors to inject arbitrary SQL commands directly into the backend database query structure, bypassing intended application logic controls that are designed to restrict access based on valid user data.
The technical nature of this flaw permits two distinct exploitation vectors: boolean-based and time-based blind SQL injection techniques. In a boolean-based attack scenario, an adversary can manipulate the logina parameter with conditional statements such as AND 1=1 or AND 1=2 to observe differences in HTTP response codes or page content, thereby deducing information about the database schema without receiving direct error messages from the server. Alternatively, time-based SQL injection involves appending delay functions like SLEEP() or WAITFOR DELAY to the injected payload, causing measurable latency in the application's response if specific conditions are met. This temporal discrepancy allows attackers to infer data character by character even when standard feedback mechanisms are suppressed or obscured by generic error handling routines common in modern web applications.
Exploitation of this vulnerability enables an attacker to perform extensive reconnaissance against the underlying database infrastructure, including identifying the specific Database Management System engine such as MySQL, PostgreSQL, or Microsoft SQL Server through version-specific syntax errors or behavior patterns. Beyond mere identification, successful exploitation grants unauthorized access to sensitive data stored within the application's backend repository, potentially exposing personally identifiable information of loan applicants, financial records, and authentication credentials. The ability to cause deliberate delays in database queries also introduces a risk of denial-of-service conditions where repeated injection attempts consume significant server resources, degrading performance for legitimate users while masking other malicious activities occurring simultaneously on the network perimeter.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-89, which describes Improper Neutralization of Special Elements used in an SQL Command, and maps to MITRE ATT&CK technique T1059.004 representing Command Scripting via SQL commands within the Execution phase. To mitigate this risk immediately, developers must implement parameterized queries or prepared statements for all database interactions involving user-supplied input, ensuring that data is treated strictly as values rather than executable code fragments. Additionally, deploying a Web Application Firewall with rules specifically tuned to detect and block common SQL injection patterns can provide an additional layer of defense while the source code is being remediated. Input validation should be enforced using allow-listing principles where only expected alphanumeric characters are permitted for login fields, combined with strict type casting on the server side to prevent unexpected data types from entering the query execution pipeline.