CVE-2025-45994
📋 TL;DR
CVE-2025-45994 is an information disclosure vulnerability in Aranda PassRecovery v1.0 that allows attackers to enumerate valid Active Directory user accounts by sending crafted POST requests to a specific endpoint. This affects organizations using Aranda PassRecovery v1.0 for password recovery operations. The vulnerability enables reconnaissance that can facilitate further attacks.
💻 Affected Systems
- Aranda PassRecovery
📦 What is this software?
Passrecovery by Arandasoft
⚠️ Risk & Real-World Impact
Worst Case
Attackers build complete lists of valid AD accounts, enabling targeted phishing, brute-force attacks, or credential stuffing against identified users, potentially leading to account compromise and lateral movement.
Likely Case
Attackers enumerate some valid accounts to identify targets for social engineering or password attacks, increasing the success rate of subsequent credential-based attacks.
If Mitigated
With proper network segmentation and monitoring, enumeration attempts are detected and blocked, limiting the attacker's ability to gather useful information.
🎯 Exploit Status
The GitHub reference contains proof-of-concept code showing simple POST requests to enumerate users. No authentication appears to be required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://arandasoft.com/en/productos/password-recovery/
Restart Required: No
Instructions:
No official patch is available. Check the vendor website for updates. Consider workarounds or alternative solutions.
🔧 Temporary Workarounds
Block vulnerable endpoint
allConfigure web application firewall or reverse proxy to block access to /user/existdirectory/1 endpoint
# Example for Apache: RewriteRule ^/user/existdirectory/1 - [F]
# Example for Nginx: location ~ ^/user/existdirectory/1 { deny all; }
Network segmentation
allRestrict access to Aranda PassRecovery to internal networks only
# Configure firewall rules to allow only trusted IP ranges
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the PassRecovery application
- Deploy monitoring and alerting for unusual POST requests to the vulnerable endpoint
🔍 How to Verify
Check if Vulnerable:
Send a POST request to https://[target]/user/existdirectory/1 with a valid AD username in the request body and check if it returns information about user existenceCheck Version:
Check application version in web interface or configuration filesVerify Fix Applied:
Attempt the same POST request after implementing controls - should receive access denied or no user information📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /user/existdirectory/1 with different usernames
- Unusual spikes in requests to the PassRecovery application
Network Indicators:
- POST requests to /user/existdirectory/1 endpoint from untrusted sources
- Pattern of sequential username attempts
SIEM Query:
source="web_logs" AND uri_path="/user/existdirectory/1" AND method="POST" | stats count by src_ip