CVE-2026-112096 in Inventory System
Summary
by MITRE • 10/19/2026
A vulnerability has been found in SourceCodester Inventory System 1.0. This vulnerability affects unknown code of the file /api/transactions_handler.php?action=save_purchase of the component Purchase Records Handler. The manipulation of the argument Product_Name/Product_Code/Vendor_Name leads to cross site scripting. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 10/19/2026
The SourceCodester Inventory System version 1.0 contains a critical security flaw within its transaction handling module, specifically located in the file api/transactions_handler.php when processing purchase records via the save_purchase action parameter. This vulnerability is classified as an injection weakness where user-supplied input fields for Product Name, Product Code, and Vendor Name are not adequately sanitized or validated before being processed by the application logic. The root cause of this issue lies in the failure to properly encode output data that originates from these specific parameters, allowing malicious actors to inject executable script content directly into the system's response stream. This type of flaw is formally categorized under CWE-79, which defines Improper Neutralization of Input During Web Page Generation, commonly known as Cross-Site Scripting or XSS. The presence of this vulnerability indicates a fundamental gap in input validation and output encoding practices within the application's backend processing pipeline for purchase transactions.
From an operational perspective, this vulnerability enables remote attackers to execute arbitrary client-side scripts in the context of the vulnerable web application without requiring any form of authentication or user interaction beyond visiting a crafted URL or having their session hijacked through social engineering vectors that leverage the stored payload. When a victim with valid credentials views a record containing the injected script, the browser will automatically parse and execute the malicious code within the security context of the inventory system's domain. This allows attackers to bypass same-origin policy restrictions, potentially leading to severe consequences such as session hijacking where attacker-controlled cookies are stolen to impersonate legitimate users, credential theft by capturing login information entered into compromised forms, or defacement of the user interface. The ability to initiate this attack remotely makes it particularly dangerous in multi-user environments where inventory data is frequently accessed and updated by various staff members with differing levels of technical awareness regarding security hygiene.
The exploitation of this vulnerability aligns closely with techniques documented in the MITRE ATT&CK framework, specifically under T1059 which covers Command and Scripting Interpreter execution via browser-based vectors, and more precisely T1189 Drive-by Client-side Execution where malicious content is delivered to a victim's system. Since the exploit has been publicly disclosed, automated scanning tools and threat actors are likely already actively probing for instances of this specific software version running in production environments. The lack of immediate patches from the vendor means that organizations relying on this open-source inventory management solution face an elevated risk profile until manual remediation steps can be implemented by their development or operations teams.
Mitigation strategies must focus on implementing robust input validation and output encoding mechanisms at both the application layer and database interaction layers. Developers should enforce strict allow-listing for all fields related to product names, codes, and vendor details, ensuring that only alphanumeric characters and a limited set of safe punctuation marks are accepted while rejecting any HTML tags or JavaScript event handlers immediately upon receipt. Furthermore, it is essential to apply context-sensitive output encoding when rendering these values in the browser, converting special characters such as ampersands, less-than signs, greater-than signs, quotes, and apostrophes into their corresponding HTML entities to prevent them from being interpreted as executable code by the client-side parser. Implementing a Content Security Policy header can also provide an additional layer of defense by restricting the sources from which scripts are allowed to load or execute within the application's context. Until these technical controls are fully deployed, administrators should consider disabling public access to the affected API endpoint if possible and closely monitoring server logs for suspicious patterns indicative of XSS attempts targeting the transactions handler module.