CVE-2025-40683: Human Resource Management System XSS Flaw

CVE-2025-40683 Overview

CVE-2025-40683 is a Reflected Cross-Site Scripting (XSS) vulnerability in Oretnom23 Human Resource Management System version 1.0. The flaw resides in the searccity parameter of the /city.php endpoint, which fails to sanitize user-supplied input before reflecting it into the HTTP response. An attacker can craft a malicious URL that executes arbitrary JavaScript in the victim's browser session when clicked. Successful exploitation requires user interaction and low-privileged authentication.

Critical Impact
Attackers can execute arbitrary JavaScript in an authenticated user's browser context, enabling session token theft, unauthorized actions on the HRM system, and phishing content injection.

Affected Products

Oretnom23 Human Resource Management System 1.0
CPE: cpe:2.3:a:oretnom23:human_resource_management_system:1.0
Vulnerable endpoint: /city.php (parameter searccity)

Discovery Timeline

2025-07-29 - CVE-2025-40683 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-40683

Vulnerability Analysis

The vulnerability is a Reflected Cross-Site Scripting flaw [CWE-79] in the Human Resource Management System (HRMS) web application. The city.php script accepts the searccity query parameter and writes its value directly into the rendered HTML response without HTML encoding or context-aware escaping.

Because the payload is reflected in the same request, exploitation requires the victim to load an attacker-controlled URL. The attacker must also possess low-privileged application credentials, as authentication is required to reach the affected page. Once triggered, the injected script runs in the victim's browser under the origin of the HRMS application.

The reflected script can read the DOM, exfiltrate session cookies not protected by HttpOnly, submit authenticated requests on behalf of the victim, and modify page content to stage further phishing attacks against HR staff. The scope change indicated in the CVSS vector reflects impact on browser resources outside the vulnerable component.

Root Cause

The root cause is missing output encoding of the searccity GET parameter in /city.php. The application concatenates untrusted input into an HTML sink without applying an HTML entity encoder or a templating engine with auto-escaping enabled.

Attack Vector

An authenticated attacker crafts a URL against the target HRMS instance containing a JavaScript payload in the searccity parameter. The attacker delivers the URL to a victim user via email, chat, or a compromised web page. When the victim's browser requests the URL, the server reflects the payload into the response, and the script executes in the victim's session context.

The vulnerability manifests when the searccity parameter value is embedded into the HTML response of city.php without sanitization. Refer to the INCIBE Security Notice on Vulnerabilities for additional technical context on the affected component.

Detection Methods for CVE-2025-40683

Indicators of Compromise

HTTP GET requests to /city.php containing script tags, event handlers, or URL-encoded JavaScript in the searccity parameter.
Web server access logs showing searccity values containing strings such as <script, onerror=, javascript:, or encoded variants like %3Cscript%3E.
Referer headers pointing to external attacker-controlled domains preceding requests to /city.php.

Detection Strategies

Deploy Web Application Firewall (WAF) rules that flag HTML markup and JavaScript keywords in the searccity query parameter.
Alert on anomalous outbound requests from browsers immediately following a session with the HRMS application, indicating potential cookie exfiltration.
Correlate authentication session activity with unusual API calls originating from the same session token to identify hijacked sessions.

Monitoring Recommendations

Enable verbose HTTP request logging on the HRMS web server, capturing full query strings and User-Agent values.
Monitor for repeated failed sanitization patterns across other input parameters, as the codebase may contain similar flaws.
Track user reports of unexpected page behavior, redirects, or credential prompts within the HRMS application.

How to Mitigate CVE-2025-40683

Immediate Actions Required

Restrict access to the HRMS application to trusted internal networks or via VPN until a fix is applied.
Educate HRMS users to avoid clicking untrusted links referencing city.php or containing the searccity parameter.
Rotate active session tokens and require re-authentication for all HRMS users.

Patch Information

No vendor patch or advisory URL is currently listed for this vulnerability. Consult the INCIBE Security Notice on Vulnerabilities for the most recent guidance and monitor the Oretnom23 project for updates.

Workarounds

Apply HTML entity encoding on the searccity parameter before rendering it in any HTML context within city.php.
Deploy a WAF signature that blocks requests to /city.php where searccity contains angle brackets, script keywords, or JavaScript URI schemes.
Set the HttpOnly and Secure flags on session cookies to reduce the impact of script-based cookie theft.
Implement a strict Content Security Policy (CSP) that disallows inline scripts and restricts script sources to trusted origins.

bash

# Example ModSecurity rule to block reflected XSS attempts on the vulnerable parameter
SecRule ARGS:searccity "@rx (?i)(<script|onerror=|onload=|javascript:|%3Cscript)" \
    "id:1040683,phase:2,deny,status:403,\
    msg:'CVE-2025-40683 XSS attempt on /city.php searccity parameter',\
    tag:'CWE-79'"