CVE-2025-51628
📋 TL;DR
An Insecure Direct Object Reference (IDOR) vulnerability in the PdfHandler component of Agenzia Impresa Eccobook allows unauthenticated attackers to access confidential documents by manipulating the DocumentoId parameter. This affects all users of Eccobook v2.81.1 and earlier versions, potentially exposing sensitive business documents.
💻 Affected Systems
- Agenzia Impresa Eccobook
⚠️ 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
Complete exposure of all confidential documents stored in the system, including financial records, contracts, and sensitive business information, leading to data breaches and regulatory violations.
Likely Case
Unauthorized access to multiple confidential documents by attackers scanning for predictable DocumentoId values, resulting in data leakage and privacy violations.
If Mitigated
Limited or no data exposure if proper access controls and input validation are implemented.
🎯 Exploit Status
Exploitation requires only manipulation of DocumentoId parameter values, making it trivial for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://agenzia.com
Restart Required: No
Instructions:
1. Check vendor website for security updates. 2. Apply any available patches. 3. Verify the fix by testing DocumentoId parameter access controls.
🔧 Temporary Workarounds
Implement Access Control Middleware
allAdd server-side authorization checks for all DocumentoId parameter requests
Implement authentication and authorization middleware that validates user permissions before serving documents
Use Obfuscated Document IDs
allReplace predictable DocumentoId values with cryptographically secure random identifiers
Generate UUIDs or encrypted tokens for document references instead of sequential IDs
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block suspicious DocumentoId parameter patterns
- Restrict network access to the Eccobook application to trusted IP addresses only
🔍 How to Verify
Check if Vulnerable:
Test if changing DocumentoId parameter values in PDF requests returns different documents without authenticationCheck Version:
Check Eccobook version in application interface or configuration filesVerify Fix Applied:
Verify that DocumentoId parameter manipulation no longer returns unauthorized documents and proper authentication is required📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful PDF downloads
- Unusual patterns of DocumentoId parameter values in requests
- PDF downloads from unauthenticated or unauthorized user accounts
Network Indicators:
- Unusual spikes in PDF download traffic
- Requests with sequential DocumentoId parameter values
- PDF requests without proper authentication headers
SIEM Query:
source="web_server" AND (uri="*DocumentoId=*" OR uri="*.pdf*") AND NOT (user="authenticated_user" OR auth_success="true")