CVE-2025-40700: Idieikon Governalia XSS Vulnerability

CVE-2025-40700 Overview

CVE-2025-40700 is a reflected Cross-Site Scripting (XSS) vulnerability affecting IDI Eikon's Governalia platform. The flaw resides in the /search endpoint, where the q query parameter is reflected into the response without proper output encoding or input sanitization. An attacker who lures an authenticated victim into clicking a crafted URL can execute arbitrary JavaScript in the victim's browser context. Successful exploitation enables session cookie theft, unauthorized actions on behalf of the victim, and phishing content injection within the trusted application origin. The issue is tracked under CWE-79 (Improper Neutralization of Input During Web Page Generation).

Critical Impact
Attackers can hijack authenticated sessions and perform actions as the victim by delivering a malicious link targeting the /search endpoint of Governalia.

Affected Products

IDI Eikon Governalia (all versions identified by CPE cpe:2.3:a:idieikon:governalia:*)
Web-facing deployments exposing the /search endpoint
Authenticated user sessions interacting with the vulnerable parameter

Discovery Timeline

2025-12-02 - CVE-2025-40700 published to NVD
2026-01-30 - Last updated in NVD database

Technical Details for CVE-2025-40700

Vulnerability Analysis

The vulnerability is a reflected XSS flaw in the Governalia web application. The application accepts user-supplied input through the q query parameter on the /search route and includes that input in the rendered HTML response without contextual output encoding. When a victim's browser loads the crafted response, the injected payload executes within the application's origin. Because the payload runs under the same origin as Governalia, it inherits access to session cookies, local storage, and authenticated API endpoints. The attacker can exfiltrate session identifiers, submit forms, or pivot to additional internal resources accessible to the authenticated user.

Root Cause

The root cause is missing input validation and missing output encoding when handling the q search parameter. The application reflects raw user input into the HTML response body, which allows <script> tags and event-handler attributes to be parsed and executed by the browser. The absence of a restrictive Content Security Policy (CSP) compounds the issue by permitting inline script execution.

Attack Vector

Exploitation requires user interaction. An attacker crafts a URL such as https://<governalia-host>/search?q=<malicious_payload> and delivers it through phishing email, instant messaging, or a malicious referrer. When the authenticated victim opens the link, the injected JavaScript executes immediately. No prior privileges are required to construct the link, but the impact scales with the privileges of the targeted user.

No verified public proof-of-concept code has been published. Refer to the INCIBE notice on this XSS vulnerability for advisory details.

Detection Methods for CVE-2025-40700

Indicators of Compromise

HTTP GET requests to /search containing <script>, javascript:, onerror=, onload=, or URL-encoded equivalents in the q parameter
Outbound requests from user browsers to attacker-controlled domains immediately following a /search visit
Unexpected session cookie transmission to external hosts after user clicks an inbound link

Detection Strategies

Inspect web server and reverse proxy logs for anomalous payload patterns in the q query parameter
Deploy a Web Application Firewall (WAF) rule that flags script tags, event handlers, and encoded XSS payloads on the /search route
Correlate referrer headers pointing to external domains with subsequent requests containing scripting metacharacters

Monitoring Recommendations

Enable verbose access logging on the Governalia application and forward logs to centralized analytics
Alert on browser-side Content Security Policy (CSP) violation reports if CSP is enforced
Monitor for spikes in /search traffic originating from external referrers or unfamiliar geographies

How to Mitigate CVE-2025-40700

Immediate Actions Required

Contact IDI Eikon to obtain the vendor's remediated build and apply it across all Governalia instances
Deploy a WAF rule that blocks XSS payload patterns on the /search endpoint until the patch is applied
Rotate active session tokens and invalidate cookies for users who may have clicked suspicious links

Patch Information

At the time of publication, no vendor advisory URL is listed in the NVD record. Coordinate directly with IDI Eikon through the Governalia product site to confirm patch availability and upgrade paths.

Workarounds

Enforce a strict Content Security Policy that disallows inline scripts and limits script sources to trusted origins
Apply server-side input validation and contextual HTML output encoding on the q parameter before rendering
Set the HttpOnly and Secure flags on session cookies to limit cookie theft from injected scripts
Educate users to avoid clicking unsolicited links referencing the Governalia /search URL

bash

# Example Nginx configuration to enforce a restrictive CSP and block suspicious /search payloads
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; frame-ancestors 'none'" always;
add_header X-XSS-Protection "1; mode=block" always;

location /search {
    if ($arg_q ~* "(<script|javascript:|onerror=|onload=|%3Cscript)") {
        return 403;
    }
    proxy_pass http://governalia_backend;
}