CVE-2025-62256
📋 TL;DR
This vulnerability allows remote attackers to access Liferay's OpenAPI YAML file through a crafted URL, potentially exposing API documentation and internal system details. It affects Liferay Portal 7.4.0-7.4.3.109 and multiple Liferay DXP versions. Attackers can exploit this without authentication in certain configurations.
💻 Affected Systems
- Liferay Portal
- Liferay DXP
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers obtain detailed API documentation revealing internal endpoints, parameters, and potentially sensitive information about the application architecture, facilitating further attacks.
Likely Case
Unauthorized access to OpenAPI documentation that could help attackers understand the application's API structure and identify potential attack vectors.
If Mitigated
Limited exposure of non-sensitive API documentation with no direct access to application data or functionality.
🎯 Exploit Status
Requires crafting specific URLs to bypass access controls. No authentication needed in vulnerable configurations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Liferay Portal 7.4.3.110+, Liferay DXP 2023.Q4.6+, 2023.Q3.8+, 7.4 update 93+, 7.3 update 36+
Vendor Advisory: https://liferay.dev/portal/security/known-vulnerabilities/-/asset_publisher/jekt/content/CVE-2025-62256
Restart Required: No
Instructions:
1. Download the appropriate fix pack from Liferay's customer portal. 2. Apply the fix pack according to Liferay's deployment documentation. 3. Verify the fix by testing OpenAPI access controls.
🔧 Temporary Workarounds
Restrict OpenAPI Access via Web Server
allConfigure web server (Apache/Nginx) to block access to OpenAPI endpoints
# Apache: Add to .htaccess or virtual host config
<Location "/o/api">
Order deny,allow
Deny from all
</Location>
# Nginx: Add to server block
location /o/api {
deny all;
return 403;
}
Disable OpenAPI Module
allDisable the OpenAPI module in Liferay configuration
# Add to portal-ext.properties
module.framework.properties.osgi.console=localhost:11311
# Then use Gogo shell to stop module:
bundle:stop com.liferay.portal.openapi.rest.impl
🧯 If You Can't Patch
- Implement network-level access controls to restrict access to Liferay instances from untrusted networks.
- Deploy a web application firewall (WAF) with rules to block requests to OpenAPI endpoints.
🔍 How to Verify
Check if Vulnerable:
Attempt to access /o/api?endpoint=openapi.yaml or similar OpenAPI endpoints without authentication. If accessible, system is vulnerable.Check Version:
Check Liferay Control Panel → Server Administration → Properties → liferay.home/build.{version} or use Gogo shell: bundle:list | grep -i liferayVerify Fix Applied:
After patching, verify that OpenAPI endpoints return proper access denied responses for unauthorized requests.📡 Detection & Monitoring
Log Indicators:
- HTTP 200 responses to /o/api* endpoints from unauthenticated users
- Unusual access patterns to OpenAPI documentation URLs
Network Indicators:
- HTTP GET requests to /o/api?endpoint=openapi.yaml or similar patterns
- Traffic to OpenAPI endpoints from external IPs
SIEM Query:
source="liferay.log" AND (uri_path="/o/api" OR uri_path CONTAINS "openapi") AND http_status=200 AND user="-"