CVE-2025-13671: OpenText Web Site Management CSRF Flaw

CVE-2025-13671 Overview

A Cross-Site Request Forgery (CSRF) vulnerability has been identified in OpenText™ Web Site Management Server. This vulnerability allows attackers to craft malicious HTML pages that, when visited by an authenticated user with an active session, can trigger unauthorized actions within the product. The attack exploits the lack of proper CSRF token validation, causing users to unknowingly perform state-changing operations.

Critical Impact

Authenticated users visiting malicious pages may unknowingly perform unauthorized configuration changes or administrative actions within OpenText™ Web Site Management Server.

Affected Products

• OpenText™ Web Site Management Server 16.7.0
• OpenText™ Web Site Management Server 16.7.1

Discovery Timeline

• 2026-02-19 - CVE CVE-2025-13671 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2025-13671

Vulnerability Analysis

This CSRF vulnerability (CWE-352) exists due to insufficient validation of request origins in OpenText™ Web Site Management Server. When users with active authenticated sessions interact with a malicious page controlled by an attacker, their browser automatically includes session credentials with forged requests. The application fails to distinguish between legitimate user-initiated requests and those crafted by an attacker, allowing unauthorized actions to be executed under the victim's authenticated context.

The attack requires user interaction—specifically, the victim must visit a malicious web page while maintaining an active session with the Web Site Management Server. This social engineering component is essential for successful exploitation.

Root Cause

The root cause of this vulnerability stems from the absence or improper implementation of anti-CSRF mechanisms in OpenText™ Web Site Management Server versions 16.7.0 and 16.7.1. State-changing requests are processed without verifying that they originate from legitimate user interactions within the application's interface. The server fails to validate request tokens or check the origin/referer headers adequately, allowing cross-origin requests to execute privileged operations.

Attack Vector

The attack vector is network-based, requiring an attacker to host malicious HTML content on a web server accessible to the victim. When an authenticated user navigates to the attacker-controlled page, embedded HTML elements such as forms or scripts automatically submit requests to the vulnerable OpenText server. Since the victim's browser includes valid session cookies, the server processes these forged requests as legitimate, executing whatever actions the malicious payload specifies.

Typical exploitation scenarios include embedding auto-submitting forms in phishing emails, compromised websites, or malicious advertisements. The attacker can target administrative functions to modify site configurations, create new accounts, or alter content management settings without the victim's knowledge.

Detection Methods for CVE-2025-13671

Indicators of Compromise

• Unexpected configuration changes in Web Site Management Server without corresponding administrator activity logs
• User accounts reporting actions they did not perform within the management interface
• HTTP POST requests to sensitive endpoints originating from external referrers
• Unusual session activity patterns showing rapid state changes from external origins

Detection Strategies

• Monitor web server access logs for requests to state-changing endpoints with missing or invalid CSRF tokens
• Implement correlation rules to detect requests with mismatched Origin or Referer headers against expected domains
• Review authentication logs for session reuse patterns that indicate potential CSRF exploitation
• Deploy web application firewall (WAF) rules to detect and block cross-origin form submissions to critical endpoints

Monitoring Recommendations

• Enable detailed request logging on OpenText™ Web Site Management Server to capture referrer information
• Implement real-time alerting for administrative actions performed outside normal business workflows
• Monitor for spikes in configuration change requests that may indicate automated CSRF exploitation
• Establish baseline user behavior profiles to detect anomalous administrative activities

How to Mitigate CVE-2025-13671

Immediate Actions Required

• Review the OpenText Security Knowledge Base for official remediation guidance
• Restrict access to the Web Site Management Server administrative interface to trusted networks only
• Educate users about the risks of clicking unknown links while authenticated to the management console
• Implement additional authentication factors for sensitive administrative operations where possible

Patch Information

OpenText has published security guidance for this vulnerability in their knowledge base article KB0854846. Organizations running affected versions (16.7.0 or 16.7.1) should consult the OpenText Security Knowledge Base for specific patch availability and upgrade instructions. Contact OpenText support for direct assistance with remediation planning.

Workarounds

• Implement network segmentation to limit access to the Web Site Management Server from untrusted networks
• Configure web application firewall rules to validate request origins and block suspicious cross-origin submissions
• Advise administrators to use dedicated browser sessions for management activities and avoid browsing external sites while authenticated
• Enable browser security features such as SameSite cookie attributes at the reverse proxy level if application-level fixes are unavailable

# Example: Restrict access to management interface via firewall
# Allow only trusted administrative subnet
iptables -A INPUT -p tcp --dport 443 -s 10.0.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP