CVE-2026-2101: ENOVIAvpm Web Access XSS Vulnerability

CVE-2026-2101 Overview

A Reflected Cross-Site Scripting (XSS) vulnerability has been identified in ENOVIAvpm Web Access, affecting versions from ENOVIAvpm Version 1 Release 16 through ENOVIAvpm Version 1 Release 19. This vulnerability allows an attacker to execute arbitrary script code within a user's browser session by crafting malicious URLs or input that gets reflected back in the application's response without proper sanitization.

Critical Impact

Successful exploitation enables attackers to execute arbitrary JavaScript in the context of authenticated user sessions, potentially leading to session hijacking, credential theft, and unauthorized actions performed on behalf of victims.

Affected Products

• ENOVIAvpm Web Access Version 1 Release 16
• ENOVIAvpm Web Access Version 1 Release 17
• ENOVIAvpm Web Access Version 1 Release 18
• ENOVIAvpm Web Access Version 1 Release 19

Discovery Timeline

• 2026-02-16 - CVE-2026-2101 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2026-2101

Vulnerability Analysis

This reflected XSS vulnerability (CWE-79) occurs when ENOVIAvpm Web Access fails to properly sanitize user-supplied input before reflecting it back in the HTTP response. When a victim clicks a malicious link containing crafted JavaScript payload, the vulnerable application echoes the malicious script directly into the page content. The browser then executes this script in the security context of the ENOVIAvpm Web Access domain, granting the attacker access to sensitive session data, cookies, and the ability to perform actions as the authenticated user.

The attack requires user interaction—specifically, the victim must be tricked into clicking a malicious link while authenticated to the ENOVIAvpm Web Access application. This could be accomplished through phishing emails, malicious websites, or social engineering tactics targeting ENOVIAvpm users.

Root Cause

The root cause of CVE-2026-2101 is improper input validation and output encoding within the ENOVIAvpm Web Access application. User-supplied data is reflected in HTTP responses without adequate sanitization, allowing HTML and JavaScript content to be injected and executed. The application fails to implement proper context-aware output encoding, which would prevent malicious scripts from being interpreted by the browser.

Attack Vector

The attack is network-based and requires low privileges but does require user interaction. An attacker crafts a malicious URL containing JavaScript payload and distributes it to potential victims. When an authenticated user clicks the link, the ENOVIAvpm Web Access application reflects the malicious script in its response. The victim's browser executes the script, which can then steal session cookies, capture keystrokes, redirect users to phishing sites, or perform unauthorized actions within the application context.

The vulnerability's impact extends beyond simple data theft—because the script executes with the same origin as the legitimate application, it can access and modify any content the user can see, submit forms, and interact with the application's API on behalf of the victim.

Detection Methods for CVE-2026-2101

Indicators of Compromise

• Unusual URL patterns in web server logs containing encoded JavaScript or HTML tags in query parameters
• HTTP requests with suspicious payloads such as <script>, javascript:, onerror=, or encoded variants targeting ENOVIAvpm endpoints
• Reports from users about unexpected application behavior, pop-ups, or redirects after clicking links
• Session anomalies where authenticated sessions exhibit behavior inconsistent with normal user activity

Detection Strategies

• Deploy Web Application Firewalls (WAF) with XSS detection rules to identify and block malicious requests containing script injection attempts
• Implement Content Security Policy (CSP) headers to restrict script execution sources and report violations
• Monitor web server access logs for requests containing XSS payload signatures targeting ENOVIAvpm Web Access endpoints
• Utilize browser-based security tools and endpoint detection solutions to identify XSS exploitation attempts

Monitoring Recommendations

• Enable detailed logging of all HTTP requests to ENOVIAvpm Web Access, including full query strings and POST data
• Configure alerting on CSP violation reports to identify potential XSS exploitation attempts
• Monitor for unusual patterns in session activity that may indicate session hijacking following XSS exploitation
• Implement regular security scanning of ENOVIAvpm Web Access for XSS vulnerabilities

How to Mitigate CVE-2026-2101

Immediate Actions Required

• Review the 3DS Security Advisory for official patch and remediation guidance
• Implement Web Application Firewall rules to filter known XSS attack patterns as a temporary mitigation
• Consider restricting access to ENOVIAvpm Web Access to trusted networks until patches are applied
• Educate users about the risks of clicking unfamiliar links, especially those pointing to ENOVIAvpm resources

Patch Information

Organizations should consult the official 3DS Security Advisory for specific patch availability and installation instructions. Upgrading to a patched version of ENOVIAvpm Web Access that addresses CVE-2026-2101 is the recommended remediation approach. Contact Dassault Systèmes support for enterprise-specific guidance on patch deployment.

Workarounds

• Deploy Content Security Policy (CSP) headers with strict script-src directives to prevent inline script execution
• Implement HTTP-only and Secure flags on session cookies to reduce the impact of successful XSS attacks
• Configure WAF rules to sanitize or block requests containing common XSS payloads targeting ENOVIAvpm endpoints
• Restrict ENOVIAvpm Web Access to internal networks or VPN-connected users to limit attacker reach

# Example CSP header configuration for Apache
# Add to httpd.conf or .htaccess for ENOVIAvpm Web Access
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; object-src 'none'; frame-ancestors 'self';"
Header set X-XSS-Protection "1; mode=block"
Header set X-Content-Type-Options "nosniff"