CVE-2025-27847
📋 TL;DR
This vulnerability in ESPEC North America Web Controller 3 allows user session privileges to persist after logout, potentially enabling unauthorized access. Affected systems are those running Web Controller 3 versions before 3.3.8. This impacts organizations using ESPEC environmental test chambers with web-based control interfaces.
💻 Affected Systems
- ESPEC North America Web Controller 3
⚠️ 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
An attacker who gains access to a logged-out session could perform administrative actions, modify chamber settings, or access sensitive operational data without authentication.
Likely Case
Privilege escalation where a user with lower privileges retains higher privileges after logout, or unauthorized access to previously authenticated sessions.
If Mitigated
Limited impact with proper session management controls, network segmentation, and monitoring in place.
🎯 Exploit Status
Requires access to the web interface and knowledge of session management flaws; no public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.3.8
Vendor Advisory: https://espec.com/na/about/detail/cve_2025_27847
Restart Required: No
Instructions:
1. Access ESPEC Web Controller admin interface. 2. Navigate to System Updates. 3. Apply update to version 3.3.8. 4. Verify update completes successfully.
🔧 Temporary Workarounds
Force Session Termination
allManually terminate all active sessions through admin interface after each logout
Admin interface: System > Sessions > Terminate All
Reduce Session Timeout
allConfigure shorter session timeout values to limit exposure window
Admin interface: Security > Session Settings > Set timeout to 5 minutes
🧯 If You Can't Patch
- Implement network segmentation to isolate ESPEC controllers from general network traffic
- Enable detailed logging of all authentication and session events for monitoring
🔍 How to Verify
Check if Vulnerable:
Check Web Controller version in admin interface; if version is below 3.3.8, system is vulnerable.Check Version:
Admin interface: System > About > Version InformationVerify Fix Applied:
After update, verify version shows 3.3.8 and test that sessions are properly terminated on logout.📡 Detection & Monitoring
Log Indicators:
- Multiple successful authentications from same session ID after logout events
- Session tokens being reused after logout
Network Indicators:
- Unusual API calls to /api/v4/auth/ endpoints after logout events
- Session cookies persisting beyond expected lifetime
SIEM Query:
source="espec_web_controller" AND (event_type="session_persist" OR (auth_event="logout" AND api_call="*auth*"))