CVE-2025-27604: XWiki Confluence Migrator Disclosure Flaw

CVE-2025-27604 Overview

CVE-2025-27604 is an information disclosure vulnerability affecting XWiki Confluence Migrator Pro, a tool that helps administrators import Confluence packages into XWiki instances. The vulnerability stems from the application's homepage being publicly accessible, which allows unauthenticated guest users to download Confluence migration packages that may contain sensitive organizational data.

Critical Impact

Unauthenticated attackers can access and download sensitive Confluence migration packages without any authentication, potentially exposing confidential organizational data, credentials, and internal documentation.

Affected Products

• XWiki Confluence Migrator Pro (versions prior to 1.11.7)

Discovery Timeline

• March 7, 2025 - CVE-2025-27604 published to NVD
• March 13, 2025 - Last updated in NVD database

Technical Details for CVE-2025-27604

Vulnerability Analysis

This vulnerability represents a broken access control issue where the XWiki Confluence Migrator Pro application fails to properly restrict access to its homepage and associated download functionality. When administrators use this tool to migrate content from Confluence to XWiki, the migration packages are temporarily stored and made accessible through the application interface. Due to missing authentication checks on the homepage endpoint, any unauthenticated user can access these packages.

The exposure is particularly concerning because Confluence packages often contain wiki pages, attachments, user data, internal documentation, configuration details, and potentially sensitive business information that organizations intended to migrate privately.

Root Cause

The root cause is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). The application's homepage lacks proper access control mechanisms, allowing guest users to view and interact with functionality that should be restricted to authenticated administrators. The developers failed to implement authentication requirements on the page that provides access to downloaded migration packages.

Attack Vector

The attack vector is network-based and requires no authentication, privileges, or user interaction. An attacker simply needs network access to the XWiki instance running the vulnerable Confluence Migrator Pro application. By navigating to the publicly accessible homepage, the attacker can enumerate and download available Confluence migration packages.

The attack flow involves:

1. Identifying a target XWiki instance with Confluence Migrator Pro installed
2. Accessing the application's public homepage without authentication
3. Browsing available migration packages that should be restricted
4. Downloading packages containing potentially sensitive Confluence data

Detection Methods for CVE-2025-27604

Indicators of Compromise

• Unexpected or unauthorized access requests to the Confluence Migrator Pro homepage from external IP addresses
• Download events for Confluence migration packages by unauthenticated sessions
• Anomalous traffic patterns targeting XWiki application endpoints related to migration functionality
• Log entries showing guest user access to administrative migration tools

Detection Strategies

• Monitor web server access logs for requests to Confluence Migrator Pro endpoints from unauthenticated users
• Implement alerting on file download events for migration packages from non-administrative sessions
• Review XWiki access logs for suspicious patterns indicating reconnaissance or data exfiltration attempts
• Deploy web application firewall rules to flag unauthenticated access to migration tool paths

Monitoring Recommendations

• Enable detailed logging for the XWiki Confluence Migrator Pro application
• Configure alerts for any guest user interactions with migration functionality
• Implement network monitoring for large data transfers from XWiki migration endpoints
• Regularly audit access logs to identify potential exploitation attempts before and after patching

How to Mitigate CVE-2025-27604

Immediate Actions Required

• Upgrade XWiki Confluence Migrator Pro to version 1.11.7 or later immediately
• Restrict network access to XWiki instances running the vulnerable application until patched
• Remove or secure any existing Confluence migration packages that may have been exposed
• Conduct an audit of access logs to determine if the vulnerability was exploited prior to patching

Patch Information

XWiki has released version 1.11.7 of the Confluence Migrator Pro application which addresses this vulnerability. The fix has been committed to the application repository and implements proper access controls on the application homepage.

For detailed technical information about the patch, refer to the GitHub commit 6ced42b and the GitHub Security Advisory GHSA-3w9f-2pph-j5vc.

Workarounds

• If immediate patching is not possible, restrict access to the XWiki instance at the network level using firewall rules
• Implement reverse proxy authentication to require credentials before accessing XWiki migration tools
• Temporarily disable or remove the Confluence Migrator Pro application until the update can be applied
• Ensure any sensitive migration packages are deleted from the system when not actively in use

# Example: Restrict access to XWiki at the firewall level (iptables)
# Replace YOUR_ADMIN_IP with trusted administrator IP addresses
iptables -A INPUT -p tcp --dport 8080 -s YOUR_ADMIN_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP