CVE-2026-90574 in Sales and Inventory System
Summary
by MITRE • 09/13/2026
A security flaw has been discovered in itsourcecode Sales and Inventory System 1.0. This affects an unknown function of the file /pages/emp_transac.php?action=add. The manipulation of the argument firstname results in sql injection. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks.
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Analysis
by VulDB Data Team • 09/13/2026
The itsourcecode Sales and Inventory System version 1.0 contains a critical SQL Injection vulnerability located within the employee transaction management module, specifically targeting the /pages/emp_transac.php script when invoked with the action parameter set to add. This flaw arises from inadequate input validation and sanitization mechanisms applied to the firstname argument before it is incorporated into database queries. As a result, an attacker can inject malicious SQL code through this field, bypassing intended application logic and directly interacting with the underlying database management system. The vulnerability represents a classic instance of improper neutralization of special elements used in an SQL command, commonly categorized under CWE-89 within the Common Weakness Enumeration framework. This type of flaw is particularly dangerous because it allows for unauthorized data access, modification, or deletion depending on the privileges granted to the database user account associated with the web application.
The operational impact of this vulnerability is severe due to its remote exploitability and the availability of public proof-of-concept exploits. Attackers can leverage automated tools such as sqlmap to systematically extract sensitive information from the database without requiring authentication or prior knowledge of the schema structure. The ability to perform blind SQL injection means that even if error messages are suppressed, attackers can infer data by observing response times or boolean-based differences in application behavior. This capability enables the exfiltration of user credentials, personal identifiable information stored within employee records, and potentially administrative access tokens. In many inventory systems, such databases also contain financial transaction logs and supplier details, making the breach a significant risk for both privacy compliance violations like GDPR or CCPA and potential business disruption through data tampering or destruction.
From an offensive security perspective, this vulnerability aligns with several tactics in the MITRE ATT&CK framework. The initial exploitation phase corresponds to T1190 Exploit Public-Facing Application, where attackers target known vulnerabilities in internet-accessible software. Once access is gained, the subsequent actions of extracting data map directly to T1213 Data from Information Repositories and potentially T1078 Valid Accounts if administrative credentials are harvested for further lateral movement within the network infrastructure. The existence of public exploits significantly lowers the barrier to entry for threat actors, increasing the likelihood of automated scanning campaigns targeting this specific software version across the internet. Organizations running this system must recognize that passive monitoring is insufficient given the active exploitation landscape surrounding these known flaws.
Mitigation strategies require immediate remediation at both the application code level and infrastructure layer. The primary fix involves refactoring the emp_transac.php script to utilize parameterized queries or prepared statements, which ensure that user input is treated strictly as data rather than executable SQL commands. This approach effectively neutralizes injection attempts by separating code from data during query execution. Additionally, implementing strict input validation on all fields, including restricting character sets and lengths for the firstname parameter, adds a layer of defense in depth. Web Application Firewalls can be configured with specific rules to detect and block common SQL injection patterns targeting this endpoint, providing temporary protection while patches are deployed. It is also critical to ensure that the database user account used by the application adheres to the principle of least privilege, limiting permissions to only those necessary for normal operations to minimize the potential damage if an injection succeeds. Regular security audits and penetration testing should be conducted to verify that similar vulnerabilities do not exist in other parts of the system.