CVE-2025-7866: Portabilis I-educar XSS Vulnerability

CVE-2025-7866 Overview

CVE-2025-7866 is a reflected cross-site scripting (XSS) vulnerability in Portabilis i-Educar 2.9.0. The flaw resides in the Disabilities Module, specifically in the /intranet/educar_deficiencia_lst.php script. Attackers can inject malicious script content through the Deficiência ou Transtorno parameter. The issue is classified under [CWE-79] Improper Neutralization of Input During Web Page Generation. The exploit has been publicly disclosed, and the vendor did not respond to disclosure attempts. Portabilis i-Educar is a school management platform widely used across Brazilian educational institutions.

Critical Impact
Authenticated attackers can inject arbitrary JavaScript into the Disabilities Module, enabling session token theft, browser-based attacks, and unauthorized actions in the context of other authenticated users.

Affected Products

Portabilis i-Educar 2.9.0
Component: Disabilities Module (/intranet/educar_deficiencia_lst.php)
Parameter: Deficiência ou Transtorno

Discovery Timeline

2025-07-20 - CVE-2025-7866 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-7866

Vulnerability Analysis

The vulnerability affects the Disabilities Module list script educar_deficiencia_lst.php in Portabilis i-Educar. The application accepts user-supplied input through the Deficiência ou Transtorno argument and reflects it into the rendered HTML response without sufficient output encoding. This allows an attacker to inject arbitrary JavaScript that executes in the victim's browser session.

Exploitation requires network access to the application and low-privilege authentication. User interaction is required, since the target must load the crafted URL or interact with the affected list view. Successful exploitation impacts the confidentiality and integrity of the affected user's session within the application scope.

Root Cause

The root cause is improper neutralization of user-supplied input during web page generation [CWE-79]. The Deficiência ou Transtorno parameter is echoed back into the HTML response without HTML entity encoding or contextual output escaping. Any special characters used to construct HTML or JavaScript payloads pass through unfiltered.

Attack Vector

An attacker with a low-privileged account crafts a URL targeting /intranet/educar_deficiencia_lst.php and embeds a JavaScript payload in the vulnerable parameter. The attacker then delivers the URL to another authenticated user through phishing, chat, or another social channel. When the victim loads the URL, the injected script executes in their browser under the i-Educar origin. Refer to the GitHub PoC Repository and the VulDB entry #316979 for the disclosed proof of concept.

Detection Methods for CVE-2025-7866

Indicators of Compromise

Web server access logs containing requests to /intranet/educar_deficiencia_lst.php with URL-encoded HTML tags such as %3Cscript%3E, onerror=, or onload= in query parameters.
Requests to the Disabilities Module containing the Deficiência ou Transtorno parameter with non-alphanumeric characters like <, >, ", or '.
Unusual outbound requests from user browsers to attacker-controlled domains shortly after loading i-Educar list pages.

Detection Strategies

Deploy web application firewall (WAF) rules that inspect query parameters on /intranet/educar_deficiencia_lst.php for script tags, event handlers, and JavaScript URI schemes.
Enable Content Security Policy (CSP) reporting to capture inline script violations originating from the i-Educar application.
Correlate authenticated user session activity with suspicious parameter values in web logs to identify targeted delivery of XSS payloads.

Monitoring Recommendations

Forward i-Educar web server and application logs to a centralized analytics platform for query parameter inspection and pattern matching.
Monitor for anomalous account behavior following visits to the Disabilities Module list, including password changes and privilege modifications.
Track browser telemetry for CSP violation reports referencing the i-Educar origin.

How to Mitigate CVE-2025-7866

Immediate Actions Required

Restrict access to the /intranet/educar_deficiencia_lst.php endpoint to trusted internal networks where feasible.
Deploy WAF signatures that block XSS payload patterns targeting the Deficiência ou Transtorno parameter.
Enforce a strict Content Security Policy that disallows inline scripts and untrusted script sources for the i-Educar application.
Educate administrative users to avoid clicking untrusted i-Educar URLs shared through external channels.

Patch Information

At the time of publication, the vendor Portabilis did not respond to disclosure and no official patch has been referenced in the advisory. Administrators should monitor the Portabilis i-Educar GitHub project for updates and apply any newer release beyond 2.9.0 that addresses the Disabilities Module input handling.

Workarounds

Apply input validation on the Deficiência ou Transtorno parameter at a reverse proxy or WAF, rejecting characters commonly used in XSS payloads.
Configure the application server to set X-XSS-Protection, X-Content-Type-Options: nosniff, and a restrictive Content-Security-Policy header.
Limit user accounts with access to the Disabilities Module to only those staff members who require it.

bash

# Example NGINX configuration to block obvious XSS payloads and add hardening headers
location /intranet/educar_deficiencia_lst.php {
    if ($args ~* "(<script|onerror=|onload=|javascript:)") {
        return 403;
    }
    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-Frame-Options "SAMEORIGIN" always;
    proxy_pass http://ieducar_backend;
}