Securden Unified PAM Path Traversal In File Upload

The impact of this path traversal vulnerability is severe. An attacker who successfully exploits this flaw can upload and execute arbitrary code on the Securden Unified PAM server. This could lead to complete system compromise, including data exfiltration, modification, or deletion. The attacker could also leverage this access to move laterally within the network, potentially compromising other systems connected to the Unified PAM server. The ability to upload binaries directly to the web root and configuration directories significantly expands the attack surface and increases the potential for widespread damage. This vulnerability shares similarities with other path traversal exploits where attackers leverage predictable file system structures to gain unauthorized access.

Organizations heavily reliant on Securden Unified PAM for centralized authentication and privileged access management are particularly at risk. Environments with legacy configurations or those lacking robust file upload security controls are also more vulnerable. Shared hosting environments where multiple users share the same server instance should be considered high priority.

• linux / server:

find /var/log/securden -type f -mtime -7 -name '*upload*' -print

• generic web:

curl -I 'http://<target>/upload?file=../../../../etc/passwd' # Check for 200 OK or other unexpected responses

• linux / server:

journalctl -u securden -f | grep -i 'upload' # Monitor for suspicious upload activity

1. 2025-08-25Disclosure

   disclosure

1. Reserviert2025-06-26
2. Veröffentlicht2025-08-25
3. EPSS aktualisiert2026-03-23

The primary mitigation for CVE-2025-53120 is to immediately upgrade Securden Unified PAM to version 11.3.2 or later. If upgrading is not immediately feasible, consider implementing temporary workarounds. Restrict file upload permissions to authenticated users only and implement strict input validation on uploaded files to prevent path manipulation. Consider using a Web Application Firewall (WAF) to filter out malicious requests attempting to exploit the path traversal vulnerability. Monitor system logs for suspicious file uploads or execution attempts. After upgrading, verify the fix by attempting to upload a test file with a manipulated path (e.g., ../../../../etc/passwd) and confirming that the upload is rejected.