CVE-2025-27906: IBM Content Navigator Path Traversal Flaw

CVE-2025-27906 Overview

CVE-2025-27906 is an information disclosure vulnerability affecting IBM Content Navigator versions 3.0.11, 3.0.15, 3.1.0, and 3.2.0. The application exposes its directory listing when a user requests the application URL. Attackers can enumerate application files and folders through the browser without authentication. The contents of those files cannot be read, modified, or obtained through this flaw. The weakness is classified as [CWE-548] Exposure of Information Through Directory Listing.

Critical Impact
Unauthenticated remote attackers can enumerate the file and folder structure of IBM Content Navigator deployments, providing reconnaissance data that supports follow-on attacks against the platform.

Affected Products

IBM Content Navigator 3.0.11, 3.0.15, 3.1.0, and 3.2.0
Deployments running on Microsoft Windows hosts
Deployments running on Linux and Apple macOS hosts

Discovery Timeline

2025-10-14 - CVE-2025-27906 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-27906

Vulnerability Analysis

CVE-2025-27906 is an information disclosure issue caused by the web application returning a directory index when a browser requests certain application URLs. Instead of returning a controlled response or a 403 error, the server enumerates the contents of the directory back to the client. This gives an unauthenticated remote user visibility into the layout of the application, including file names, folder names, and directory hierarchy.

An attacker cannot read, download, or modify file contents through this flaw alone. The scope of the exposure is limited to metadata about the deployed application. However, that metadata often reveals framework versions, custom modules, backup artifacts, and internal path structures that can be paired with other vulnerabilities.

Root Cause

The root cause is improper configuration of the application's URL handler, corresponding to [CWE-548] Exposure of Information Through Directory Listing. IBM Content Navigator serves a directory index when no default resource is matched, rather than suppressing directory browsing at the server or application layer.

Attack Vector

Exploitation requires only network access to the Content Navigator web interface. The attacker sends an HTTP GET request to the application root or a subdirectory URL. The server responds with an HTML listing of files and folders present in that path. No credentials, user interaction, or elevated privileges are required.

No verified public exploit code is available for CVE-2025-27906. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the IBM Support advisory for vendor-supplied technical details.

Detection Methods for CVE-2025-27906

Indicators of Compromise

Unauthenticated HTTP GET requests to IBM Content Navigator directory paths that return HTML responses containing Index of / markers or file listing tables.
Repeated crawling patterns from a single source IP enumerating multiple subdirectories under the Content Navigator context root.
Access log entries showing successful 200 responses to directory URLs that should return 403 or 404.

Detection Strategies

Inspect web server and reverse proxy logs for responses to Content Navigator paths that contain directory index HTML rather than expected application resources.
Monitor for HTTP requests to the application context root or /navigator/ subdirectories from external or untrusted networks without prior authentication.
Correlate reconnaissance activity against Content Navigator with subsequent authentication or exploitation attempts targeting the same host.

Monitoring Recommendations

Enable verbose HTTP access logging on the WebSphere or application server hosting IBM Content Navigator and forward logs to a centralized SIEM.
Create alerts for user agents and IP addresses issuing sequential requests to enumerate directories.
Baseline normal Content Navigator URL patterns and flag deviations that request paths not tied to legitimate user workflows.

How to Mitigate CVE-2025-27906

Immediate Actions Required

Apply the interim fixes referenced in the IBM Support advisory for Content Navigator 3.0.11, 3.0.15, 3.1.0, and 3.2.0.
Restrict network access to the Content Navigator web interface so it is not reachable from untrusted networks.
Audit web server logs for prior directory enumeration activity dating back to the deployment date of affected versions.

Patch Information

IBM has published remediation guidance and fix packs on its support portal. Administrators should consult the IBM Support advisory and apply the appropriate interim fix or upgrade for their installed version.

Workarounds

Disable directory browsing at the web server or application server layer until the patch is applied.
Place a reverse proxy or web application firewall in front of Content Navigator to block requests that resolve to directory index responses.
Enforce authentication at the perimeter for all Content Navigator URLs, including static content paths.

bash

# Example: disable directory listing in Apache httpd fronting Content Navigator
<Directory "/opt/ibm/content-navigator">
    Options -Indexes
    Require all denied
</Directory>