CVE-2025-34229 identifies a blind server-side request forgery (SSRF) vulnerability in Vasion Print Virtual Appliance Host and Application components prior to versions 25.1.102 and 25.1.1413 respectively. 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 a URL in the form 'http://<host-address>:80/DevMgmt/DiscoveryTree.xml' to send an HTTP request using curl. Critically, the hostname input is neither validated nor filtered against private or internal network addresses, allowing an attacker to supply arbitrary hostnames or IPs. Because the request is blind, the attacker does not receive direct response data but can infer the presence of internal services, trigger internal network actions, or gather intelligence about the internal network topology. This vulnerability stems from missing authentication controls on a critical function (CWE-306) and the SSRF weakness (CWE-918). The CVSS 4.0 base score is 6.9 (medium severity), reflecting network attack vector, no authentication required, no user interaction, and limited confidentiality and integrity impact due to the blind nature of the SSRF. No known exploits have been reported in the wild, and the patch status is confirmed but with an unclear release timeline. The vulnerability poses a risk primarily for internal network reconnaissance and potential pivoting within affected environments.

For European organizations, this vulnerability could enable attackers to perform internal network reconnaissance and potentially trigger unintended internal service actions without authentication. This can lead to exposure of sensitive internal infrastructure details, facilitating further targeted attacks such as lateral movement or exploitation of other internal vulnerabilities. Organizations relying on Vasion Print Virtual Appliance Host for print management in critical sectors (e.g., government, finance, healthcare) could face increased risk of internal network compromise. The blind SSRF limits direct data exfiltration but still undermines network integrity and confidentiality by revealing internal network structure and services. Additionally, attackers could leverage this to trigger internal processes or cause denial of service on internal resources. The lack of authentication and input validation increases the attack surface, especially in environments where the appliance is exposed or insufficiently segmented. Given the widespread use of print management solutions in enterprise environments, the potential impact on operational continuity and data security is significant if exploited.

European organizations should immediately verify the version of Vasion Print Virtual Appliance Host and Application in use and apply the latest patches or updates that remediate CVE-2025-34229. If patching is not immediately possible, implement network segmentation to isolate the appliance from sensitive internal services and restrict its outbound HTTP requests to trusted destinations only. Employ strict firewall rules and egress filtering to prevent the appliance from making arbitrary requests to internal IP ranges. Conduct thorough input validation and whitelist enforcement on any hostname or IP address parameters related to printer registration or management functions. Monitor logs for unusual outbound requests from the appliance, especially to internal network addresses or unexpected ports. Additionally, review access controls to ensure that critical functions are not accessible without authentication. Engage with Vasion support for detailed remediation guidance and confirm patch deployment status. Finally, incorporate this vulnerability into incident response and threat hunting activities to detect potential exploitation attempts.