CVE-2025-11853
📋 TL;DR
CVE-2025-11853 is an improper access control vulnerability in Sismics Teedy's API endpoint that allows unauthorized access to files. Attackers can exploit this remotely to access sensitive documents without proper authentication. This affects all Teedy installations up to version 1.11.
💻 Affected Systems
- Sismics Teedy
📦 What is this software?
Teedy by Sismics
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all stored documents including sensitive/confidential files, potentially leading to data breach and regulatory violations.
Likely Case
Unauthorized access to some files, potentially exposing sensitive business documents or personal information.
If Mitigated
Limited impact with proper network segmentation and additional authentication layers preventing exploitation.
🎯 Exploit Status
Exploit details are publicly disclosed but no public proof-of-concept code is available. Attack requires understanding of API structure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 1.12 or later
Vendor Advisory: No official vendor advisory available
Restart Required: No
Instructions:
1. Upgrade Teedy to version 1.12 or later. 2. Verify the /api/file endpoint now properly enforces access controls.
🔧 Temporary Workarounds
API Endpoint Restriction
allBlock or restrict access to the vulnerable /api/file endpoint
🧯 If You Can't Patch
- Implement network-level access controls to restrict API endpoint access to authorized users only
- Deploy a web application firewall (WAF) with rules to detect and block unauthorized API requests
🔍 How to Verify
Check if Vulnerable:
Check Teedy version via web interface or configuration files. If version is 1.11 or earlier, system is vulnerable.Check Version:
Check web interface or examine application configuration files for version informationVerify Fix Applied:
After upgrade, attempt to access /api/file endpoint with unauthorized credentials - should receive proper access denied response.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to /api/file endpoint
- Multiple failed authentication attempts followed by successful file access
Network Indicators:
- Unusual API request patterns to /api/file endpoint
- File downloads from unauthorized IP addresses
SIEM Query:
source="teedy" AND (uri_path="/api/file" AND response_code=200) AND user="anonymous"