CVE-2026-86301 in Hospital Information System
Summary
by MITRE • 09/07/2026
A vulnerability has been found in code-projects Hospital Information System 1.0. Affected is an unknown function of the file /HIS/src/patients/editPatient.php of the component Patient Management. Such manipulation of the argument ID leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 09/07/2026
The code-projects Hospital Information System version 1.0 contains a critical security flaw within its patient management module, specifically located in the editPatient.php script at the path /HIS/src/patients/editPatient.php. This vulnerability arises from an improper validation and sanitization of user-supplied input passed via the ID argument. The system fails to adequately filter special characters or encode output before rendering it back to the client browser, creating a classic injection point for malicious scripts. Because this functionality is part of the patient management interface, which typically requires authentication but may be accessible through various entry points including direct URL manipulation if session controls are weakly enforced, the attack vector remains remote and potentially exploitable by any user with access to the application or those who can trick authenticated users into interacting with crafted links.
This specific flaw is categorized as Cross-Site Scripting, commonly referred to as XSS, which corresponds to CWE-79 in the Common Weakness Enumeration standard. The technical nature of this vulnerability involves the injection of executable client-side scripts, typically JavaScript, into web pages viewed by other users. When a victim accesses a URL containing the malicious payload within the ID parameter, the browser interprets and executes the injected code as if it originated from the trusted hospital information system domain. This breaks the fundamental principle of same-origin policy, allowing the attacker to bypass access controls that would normally restrict data interaction between different sites. The impact is severe because the script runs with the privileges of the authenticated user, potentially granting the attacker full control over the victim's session within the application context.
The operational impact of this vulnerability extends beyond simple defacement or annoyance. An attacker can leverage this flaw to steal sensitive patient information by exfiltrating cookies, session tokens, and other authentication credentials stored in local storage or accessible via JavaScript APIs. This could lead to unauthorized access to private health records, violating HIPAA regulations and similar data privacy standards globally. Furthermore, the vulnerability enables phishing attacks where the malicious script can dynamically alter the page content to mimic legitimate login forms, tricking users into surrendering their credentials. In more advanced scenarios, it allows for keylogging or capturing keystrokes entered by healthcare professionals, compromising not only patient confidentiality but also administrative security controls within the hospital infrastructure.
The attack is classified under MITRE ATT&CK technique T1059, specifically Command and Scripting Interpreter: JavaScript, as well as T1078, Valid Accounts, when used to maintain persistent access after stealing credentials. Since the exploit has been disclosed publicly, automated scanning tools and malicious actors are likely already actively probing for this specific weakness in instances of code-projects Hospital Information System 1.0 that remain deployed on internet-facing servers or internal networks with weak segmentation. The ease of exploitation means that even users with limited technical knowledge can launch successful attacks using simple browser-based payloads hosted on external domains, making the risk level high and immediate action necessary to prevent data breaches.
Mitigation strategies must focus on both immediate remediation and long-term secure coding practices. The primary fix involves implementing strict input validation for the ID parameter, ensuring it accepts only expected integer values or specific alphanumeric formats without allowing special characters that could terminate HTML tags or inject script blocks. More importantly, output encoding must be applied consistently across all dynamic content rendered in the browser context to neutralize any residual malicious data. Developers should adopt a whitelist approach for input validation rather than relying on blacklist filters which are prone to bypasses using obfuscation techniques. Additionally, implementing Content Security Policy headers can significantly reduce the impact of successful XSS attacks by restricting the sources from which scripts can be loaded and executed, thereby preventing inline script execution even if injection occurs.
Beyond code-level fixes, organizational defenses should include regular security assessments such as static application security testing to catch these issues during development and dynamic scanning in staging environments before deployment. Web Application Firewalls can provide a temporary layer of defense by detecting and blocking known XSS patterns in HTTP requests, though they are not a substitute for proper input handling. For existing deployments that cannot be immediately patched, restricting access to the patient management module through strong authentication mechanisms and network segmentation limits exposure. Ensuring that session cookies have the HttpOnly flag set can also mitigate some risks associated with cookie theft via JavaScript execution, adding an additional layer of protection against credential harvesting attacks derived from this vulnerability.