CVE-2025-27651: Printerlogic Vasion Print SSRF Vulnerability

CVE-2025-27651 Overview

CVE-2025-27651 is a Server-Side Request Forgery (SSRF) vulnerability affecting Vasion Print (formerly PrinterLogic) before Virtual Appliance Host 22.0.862 and Application 20.0.2014. This vulnerability, tracked as Elatec V-2023-014, allows unauthenticated attackers to manipulate the server into making requests to arbitrary internal or external destinations, potentially exposing sensitive internal services and data.

Critical Impact

This SSRF vulnerability enables attackers to bypass network security controls and access internal resources, potentially leading to data exfiltration, internal service enumeration, and further exploitation of backend systems.

Affected Products

• Vasion Print (formerly PrinterLogic) Application versions prior to 20.0.2014
• PrinterLogic Virtual Appliance Host versions prior to 22.0.862
• PrinterLogic SaaS deployments running vulnerable versions

Discovery Timeline

• 2025-03-05 - CVE-2025-27651 published to NVD
• 2025-11-03 - Last updated in NVD database

Technical Details for CVE-2025-27651

Vulnerability Analysis

This Server-Side Request Forgery vulnerability exists in the Vasion Print application, allowing attackers to induce the server-side application to make HTTP requests to an arbitrary domain of the attacker's choosing. SSRF flaws occur when a web application fetches a remote resource without validating the user-supplied URL.

The vulnerability is particularly severe because it requires no authentication and can be exploited remotely over the network. An attacker can leverage this flaw to scan internal networks, access internal services that are otherwise protected by firewalls, retrieve sensitive data from internal systems, or use the vulnerable server as a proxy to attack other systems.

This vulnerability is part of a larger set of security issues identified in the PrinterLogic/Vasion Print product line, as documented by security researchers.

Root Cause

The root cause of this vulnerability (CWE-918: Server-Side Request Forgery) is improper validation of user-controlled input that specifies a URL or network destination. The application fails to adequately sanitize or restrict the URLs that can be requested by the server, allowing attackers to specify arbitrary destinations including internal network addresses, cloud metadata endpoints, and other sensitive resources.

Attack Vector

The attack vector for CVE-2025-27651 is network-based, requiring no user interaction or prior authentication. An attacker can craft malicious requests to the vulnerable endpoint, specifying internal network resources or external attacker-controlled servers as the target.

Typical SSRF exploitation scenarios include:

• Accessing internal services on localhost (127.0.0.1) or internal IP ranges
• Retrieving cloud instance metadata from services like AWS (169.254.169.254)
• Scanning internal network ports and services
• Bypassing IP-based access controls and firewalls
• Exploiting trust relationships between the vulnerable server and internal systems

For detailed technical analysis of this vulnerability, refer to the Pierre Kim Blog on PrinterLogic Vulnerabilities and the Full Disclosure April 2025 Report.

Detection Methods for CVE-2025-27651

Indicators of Compromise

• Outbound HTTP requests from the PrinterLogic server to unexpected internal IP addresses (e.g., 127.0.0.1, 10.x.x.x, 192.168.x.x, 172.16-31.x.x)
• Requests to cloud metadata endpoints such as 169.254.169.254
• Unusual DNS queries or HTTP traffic patterns originating from the PrinterLogic application server
• Log entries showing requests to internal service ports (databases, admin interfaces, etc.)

Detection Strategies

• Monitor network traffic for outbound connections from the PrinterLogic server to internal network ranges or known sensitive endpoints
• Implement web application firewall (WAF) rules to detect and block SSRF patterns in request parameters
• Review application logs for unusual URL parameters containing internal IP addresses or localhost references
• Deploy network segmentation alerts for cross-zone traffic originating from the PrinterLogic server

Monitoring Recommendations

• Enable verbose logging on the PrinterLogic application and review for suspicious request patterns
• Configure SIEM alerts for network traffic anomalies from print management infrastructure
• Implement egress filtering and monitor for connections to metadata services or internal-only resources
• Establish baseline network behavior for the PrinterLogic server and alert on deviations

How to Mitigate CVE-2025-27651

Immediate Actions Required

• Upgrade Vasion Print to Virtual Appliance Host version 22.0.862 or later and Application version 20.0.2014 or later
• Review firewall rules to restrict outbound traffic from the PrinterLogic server
• Implement network segmentation to limit the PrinterLogic server's access to sensitive internal resources
• Audit logs for any evidence of exploitation attempts

Patch Information

Vasion has released security updates addressing this vulnerability. Organizations should upgrade to Virtual Appliance Host version 22.0.862 or later and Application version 20.0.2014 or later. Review the official PrinterLogic Security Bulletins for complete patch information and upgrade instructions.

Workarounds

• Implement strict egress filtering on the network level to prevent the PrinterLogic server from connecting to internal resources or sensitive endpoints
• Deploy a web application firewall (WAF) with SSRF detection rules in front of the PrinterLogic application
• Restrict network access to the PrinterLogic server using firewall rules to limit exposure
• Consider temporarily isolating the PrinterLogic server until patches can be applied

# Example firewall rule to block internal network access from PrinterLogic server
# Adjust for your specific network configuration and firewall solution

# Block access to internal networks (iptables example)
iptables -A OUTPUT -s <printerlogic_server_ip> -d 10.0.0.0/8 -j DROP
iptables -A OUTPUT -s <printerlogic_server_ip> -d 172.16.0.0/12 -j DROP
iptables -A OUTPUT -s <printerlogic_server_ip> -d 192.168.0.0/16 -j DROP
iptables -A OUTPUT -s <printerlogic_server_ip> -d 169.254.169.254 -j DROP