CVE-2025-34229 is a server-side request forgery (SSRF) vulnerability found in Vasion Print Virtual Appliance Host versions prior to 25.1.102 and Application versions prior to 25.1.1413. The vulnerability exists in the /var/www/app/console_release/hp/installApp.php script, which is accessible without authentication. When a printer is registered, the software stores the printer's hostname in a variable ($printer_vo->str_host_address) and later constructs an HTTP request to 'http://<host-address>:80/DevMgmt/DiscoveryTree.xml' using curl. Critically, there is no validation, whitelisting, or filtering of the host address before making this request, allowing an attacker to supply arbitrary hostnames or IP addresses. This enables blind SSRF attacks where the attacker cannot see the response but can cause the server to interact with internal network resources. Potential attacker actions include probing internal services, triggering internal management functions, or gathering intelligence about the internal network topology. The lack of authentication and user interaction requirements significantly lowers the barrier to exploitation. Although the vulnerability does not directly expose sensitive data, it can be leveraged as a foothold for further attacks or lateral movement within the network. The vulnerability is categorized under CWE-306 (Missing Authentication for Critical Function) and CWE-918 (Server-Side Request Forgery). The CVSS 4.0 base score is 6.9, indicating medium severity. The vendor has remediated the issue, but the patch timeline is not clearly documented.

For European organizations, this vulnerability poses a risk of internal network reconnaissance and potential indirect compromise. Organizations relying on Vasion Print Virtual Appliance Host for printer management could have their internal network topology exposed to unauthenticated attackers. This could facilitate subsequent attacks such as lateral movement, exploitation of internal services, or disruption of printing infrastructure. Critical sectors such as government, healthcare, manufacturing, and finance that depend heavily on secure printing environments may face increased risk. The blind nature of the SSRF limits direct data leakage but does not eliminate the threat of triggering harmful internal actions or mapping sensitive internal services. Exploitation could lead to operational disruptions, loss of confidentiality of internal network structure, and increased attack surface for follow-on attacks. The absence of authentication requirements means attackers can exploit this vulnerability remotely without credentials, increasing the threat level. Organizations with flat network architectures or insufficient network segmentation are particularly vulnerable.

1. Immediately upgrade Vasion Print Virtual Appliance Host to version 25.1.102 or later and the Application to version 25.1.1413 or later where the vulnerability is patched. 2. Implement strict network segmentation to isolate the print management appliances from sensitive internal networks and critical infrastructure. 3. Employ firewall rules or access control lists to restrict outbound HTTP requests from the appliance to only trusted and necessary internal IP addresses and services. 4. Monitor network traffic from the appliance for unusual or unexpected outbound requests that could indicate exploitation attempts. 5. Conduct internal vulnerability assessments and penetration tests focusing on SSRF and related attack vectors within print management infrastructure. 6. Review and harden authentication and access controls around printer registration and management functions to prevent unauthorized manipulation. 7. Maintain up-to-date asset inventories to quickly identify affected systems and ensure timely patch deployment. 8. Educate IT and security teams about SSRF risks and detection techniques specific to print appliance environments.