CVE-2026-2898
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code through insecure deserialization in funadmin's AuthCloudService.php. Attackers can exploit the getMember function's cloud_account parameter to achieve remote code execution. All funadmin installations up to version 7.1.0-rc4 are affected.
💻 Affected Systems
- funadmin
📦 What is this software?
Funadmin by Funadmin
Funadmin by Funadmin
Funadmin by Funadmin
Funadmin by Funadmin
Funadmin by Funadmin
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with remote code execution leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Unauthorized access to sensitive data, privilege escalation, and potential lateral movement within the network.
If Mitigated
Limited impact with proper network segmentation and application firewalls blocking malicious payloads.
🎯 Exploit Status
Public exploit details available, making this easily weaponizable by attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - vendor unresponsive
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to any version beyond 7.1.0-rc4 if released, or implement workarounds.
🔧 Temporary Workarounds
Input Validation and Sanitization
allAdd strict input validation for the cloud_account parameter to prevent deserialization attacks
Modify app/common/service/AuthCloudService.php to validate/sanitize cloud_account input
WAF Rule Implementation
allDeploy web application firewall rules to block deserialization payloads
Add WAF rules to detect and block serialized object patterns in requests
🧯 If You Can't Patch
- Isolate the funadmin instance behind a reverse proxy with strict input filtering
- Implement network segmentation to limit access to the vulnerable endpoint
🔍 How to Verify
Check if Vulnerable:
Check funadmin version in configuration files or admin panel. If version is 7.1.0-rc4 or earlier, system is vulnerable.Check Version:
Check config files or run: grep -r 'version' /path/to/funadmin/config/Verify Fix Applied:
Test the getMember endpoint with controlled deserialization payloads to confirm they are blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to AuthCloudService.php
- Serialized object patterns in request logs
- Error messages related to deserialization
Network Indicators:
- Unusual outbound connections from funadmin server
- Payloads containing serialized PHP objects in HTTP requests
SIEM Query:
source="web_logs" AND uri="*AuthCloudService.php*" AND (request_body="*O:*" OR request_body="*C:*" OR request_body="*s:*")