CVE-2025-27647: Vasion Print Auth Bypass Vulnerability

CVE-2025-27647 Overview

CVE-2025-27647 is a critical authentication bypass vulnerability in Vasion Print (formerly PrinterLogic) that allows unauthenticated attackers to add partial administrative users without proper authentication. This flaw affects Virtual Appliance Host versions before 22.0.913 and Application versions before 20.0.2253, potentially enabling attackers to gain unauthorized administrative access to enterprise print management infrastructure.

Critical Impact

Unauthenticated remote attackers can create partial administrative user accounts, potentially compromising the entire print management infrastructure and gaining persistent access to enterprise networks.

Affected Products

• Vasion Print (formerly PrinterLogic) Application versions before 20.0.2253
• PrinterLogic Virtual Appliance Host versions before 22.0.913
• Enterprise print management deployments utilizing vulnerable PrinterLogic installations

Discovery Timeline

• 2025-03-05 - CVE-2025-27647 published to NVD
• 2025-11-03 - Last updated in NVD database

Technical Details for CVE-2025-27647

Vulnerability Analysis

This vulnerability represents a Missing Authentication for Critical Function (CWE-306) flaw in Vasion Print's user management system. The affected system fails to properly enforce authentication requirements when processing requests to add administrative users. This architectural weakness allows remote attackers to interact with privileged functionality that should only be accessible to authenticated administrators.

The vulnerability is particularly concerning because it targets the user management subsystem, which is a critical component of any enterprise application. By exploiting this flaw, attackers can establish a foothold within the print management infrastructure without requiring any prior credentials or user interaction.

Root Cause

The root cause of CVE-2025-27647 is the absence of proper authentication checks on the endpoint or function responsible for creating administrative users. The application fails to validate that requests to add admin users originate from authenticated and authorized sessions, allowing unauthenticated users to invoke this privileged operation directly.

This type of vulnerability typically occurs when developers assume certain functionality will only be accessed through authenticated workflows without implementing proper server-side validation. The designation "Partial Admin Users" suggests that while full administrative privileges may not be granted, the created accounts still possess elevated permissions that can be leveraged for further exploitation.

Attack Vector

The vulnerability is exploitable over the network without requiring any prior authentication or user interaction. An attacker with network access to the Vasion Print management interface can send specially crafted requests to create administrative accounts.

The attack scenario involves directly accessing the vulnerable user creation functionality, bypassing normal authentication flows. Once a partial administrative account is created, the attacker may leverage those elevated privileges to further compromise the system, access sensitive printer configurations, intercept print jobs containing confidential information, or pivot to other systems within the enterprise network.

Detection Methods for CVE-2025-27647

Indicators of Compromise

• Unexpected administrative user accounts appearing in the Vasion Print/PrinterLogic user management console
• User creation events in logs that lack corresponding authentication events
• Administrative accounts with unusual naming patterns or creation timestamps outside business hours
• Network requests to user management endpoints from unexpected source IPs

Detection Strategies

• Implement log monitoring for user creation events and correlate with authentication logs to identify unauthorized account creations
• Deploy network intrusion detection rules to identify unauthenticated requests to administrative endpoints
• Conduct regular audits of administrative user accounts to detect unauthorized additions
• Monitor for anomalous API or web request patterns targeting user management functionality

Monitoring Recommendations

• Enable verbose logging on Vasion Print/PrinterLogic appliances and forward logs to a SIEM solution
• Configure alerts for any new administrative account creation events
• Implement network segmentation monitoring to detect unauthorized access attempts to print management infrastructure
• Review authentication logs regularly for failed authentication attempts followed by successful administrative actions

How to Mitigate CVE-2025-27647

Immediate Actions Required

• Update Vasion Print to Application version 20.0.2253 or later immediately
• Update Virtual Appliance Host to version 22.0.913 or later
• Audit existing administrative accounts and remove any unauthorized or suspicious entries
• Restrict network access to the Vasion Print management interface to trusted administrative networks only

Patch Information

Vasion (formerly PrinterLogic) has addressed this vulnerability in Virtual Appliance Host version 22.0.913 and Application version 20.0.2253. Organizations should apply these updates as soon as possible. Detailed patch information and security bulletins are available from the PrinterLogic Security Bulletin.

Additional technical details regarding this vulnerability and related issues can be found in the Pierre Kim Blog on PrinterLogic Vulnerabilities and the Full Disclosure Security Discussion.

Workarounds

• Implement network-level access controls to restrict access to the PrinterLogic management interface from untrusted networks
• Deploy a web application firewall (WAF) to filter malicious requests targeting administrative endpoints
• Enable multi-factor authentication for all administrative access where supported
• Place the PrinterLogic appliance behind a VPN or jump server to limit exposure

# Example: Restrict access to PrinterLogic management interface using iptables
# Only allow access from trusted admin subnet 10.10.10.0/24
iptables -A INPUT -p tcp --dport 443 -s 10.10.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP