CVE-2025-13653
📋 TL;DR
This vulnerability allows authenticated users in Search Guard FLX to read documents from data streams without proper authorization when enterprise modules are disabled. It affects versions 3.1.0 through 4.0.0. The issue enables privilege escalation where users can access data beyond their assigned permissions.
💻 Affected Systems
- Search Guard FLX
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Authenticated users could exfiltrate sensitive documents from data streams they shouldn't have access to, potentially exposing confidential business data or personal information.
Likely Case
Users with basic authentication could access documents in data streams beyond their role-based permissions, leading to unauthorized data disclosure.
If Mitigated
With proper access controls and monitoring, impact would be limited to attempted unauthorized access that can be detected and blocked.
🎯 Exploit Status
Requires authenticated access and specially crafted requests. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.0.1
Vendor Advisory: https://search-guard.com/cve-advisory/
Restart Required: Yes
Instructions:
1. Upgrade to Search Guard FLX version 4.0.1 or later. 2. Restart the Search Guard FLX service. 3. Verify the upgrade was successful by checking the version.
🔧 Temporary Workarounds
Enable Enterprise Modules
allEnable Search Guard FLX enterprise modules as the vulnerability only exists when these modules are disabled.
Configure Search Guard FLX to enable enterprise modules according to your deployment requirements
🧯 If You Can't Patch
- Enable enterprise modules if currently disabled
- Implement strict network segmentation and monitor for unusual data access patterns
🔍 How to Verify
Check if Vulnerable:
Check if running Search Guard FLX version between 3.1.0 and 4.0.0 with enterprise modules disabled.Check Version:
Check Search Guard FLX configuration files or admin interface for version informationVerify Fix Applied:
Verify version is 4.0.1 or later and enterprise modules status if keeping them disabled.📡 Detection & Monitoring
Log Indicators:
- Unusual document access patterns from authenticated users
- Requests to data streams from users without proper permissions
Network Indicators:
- Multiple document retrieval requests from single authenticated sessions
- Unusual data transfer volumes from Search Guard FLX
SIEM Query:
Search for authentication events followed by document access to data streams from users with insufficient privileges