CVE-2025-40684: Human Resource Management System XSS Flaw

CVE-2025-40684 Overview

CVE-2025-40684 is a reflected Cross-Site Scripting (XSS) vulnerability in Oretnom23 Human Resource Management System version 1.0. The flaw resides in the searccountry parameter of the /country.php endpoint, which reflects user input into the response without proper sanitization or output encoding. An attacker can craft a malicious URL that executes arbitrary JavaScript in the victim's browser once the link is opened by an authenticated user. Successful exploitation can lead to session data theft, unauthorized actions performed on behalf of the victim, and delivery of secondary payloads. The vulnerability is classified under [CWE-79]: Improper Neutralization of Input During Web Page Generation.

Critical Impact
Attackers can execute arbitrary JavaScript in a victim's browser session, enabling credential theft, session hijacking, and unauthorized HRMS actions.

Affected Products

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

Discovery Timeline

2025-07-29 - CVE-2025-40684 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-40684

Vulnerability Analysis

The vulnerability is a reflected XSS flaw in the country search functionality of the Human Resource Management System. When a request reaches /country.php, the application takes the value of the searccountry query parameter and includes it in the rendered HTML response without applying context-aware output encoding or input filtering. Any HTML or JavaScript submitted through this parameter executes in the security context of the application's origin.

Because the injection is reflected rather than stored, exploitation requires the attacker to lure an authenticated HRMS user into loading a crafted URL. The attack succeeds within the victim's active session, so any privileges held by the victim become available to the injected script.

Root Cause

The root cause is missing input validation and missing output encoding on the searccountry request parameter in /country.php. The application concatenates user-controlled input directly into the HTML response, allowing tags such as <script> or event-handler attributes to break out of the intended data context and execute as code.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker crafts a URL of the form /country.php?searccountry=<payload> and delivers it via phishing email, chat message, or a malicious third-party site. When an authenticated HRMS user loads the URL, the payload executes in their browser. The attacker can then read the DOM, exfiltrate cookies that are not marked HttpOnly, submit forms on behalf of the user, or pivot to internal HRMS functions such as employee record modification.

No verified public proof-of-concept code has been published for this issue. Refer to the INCIBE advisory for coordinated details.

Detection Methods for CVE-2025-40684

Indicators of Compromise

Web server access log entries containing requests to /country.php with searccountry values that include <, >, script, onerror, onload, or URL-encoded equivalents such as %3Cscript%3E.
Outbound browser requests from HRMS users to unfamiliar external domains shortly after visiting /country.php.
HRMS session tokens appearing in third-party referrer logs or unexpected document.cookie transmissions.

Detection Strategies

Deploy a Web Application Firewall (WAF) rule that inspects the searccountry parameter for HTML metacharacters and common XSS payload signatures.
Enable a strict Content-Security-Policy and monitor report-uri or report-to endpoints for violations originating from /country.php.
Correlate HRMS authentication events with suspicious click-through referrers to detect phishing-delivered exploitation attempts.

Monitoring Recommendations

Log full query strings for the /country.php endpoint and alert on requests containing script tags, JavaScript URIs, or encoded angle brackets.
Track anomalous session activity such as rapid privilege changes, mass record exports, or logins from new geographies following exposure to a suspicious link.
Review email gateway telemetry for inbound messages containing links to internal HRMS hostnames with encoded parameters.

How to Mitigate CVE-2025-40684

Immediate Actions Required

Restrict external access to the HRMS /country.php endpoint until a vendor patch is applied, ideally by placing the application behind a VPN or authenticated reverse proxy.
Deploy WAF signatures that block XSS payloads in the searccountry parameter and any adjacent input fields on country.php.
Force reauthentication of active HRMS sessions and rotate session identifiers if suspicious activity is observed.

Patch Information

No vendor patch has been referenced in the NVD entry or the INCIBE advisory on multiple vulnerabilities in Human Resource Management System at the time of publication. Organizations running Oretnom23 Human Resource Management System 1.0 should monitor the vendor's distribution channels for a fixed release and apply it as soon as it becomes available.

Workarounds

Implement server-side input validation on searccountry to accept only expected characters such as alphanumerics and spaces, and reject requests containing HTML metacharacters.
Apply context-aware output encoding (HTML entity encoding) to any user-supplied data rendered inside country.php templates.
Set the HttpOnly and Secure flags on session cookies and enforce a SameSite=Lax or SameSite=Strict attribute to reduce the impact of a successful injection.
Deploy a strict Content-Security-Policy header that disallows inline scripts and restricts script sources to trusted origins.

bash

# Example NGINX rule to block obvious XSS payloads on /country.php
location = /country.php {
    if ($arg_searccountry ~* "(<|%3C)\s*script|onerror=|onload=|javascript:") {
        return 403;
    }
    # Harden response headers
    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
    proxy_pass http://hrms_backend;
}