CVE-2025-54551 Overview
CVE-2025-54551 is a privilege escalation vulnerability affecting Fujifilm Synapse Mobility medical imaging software. The flaw stems from external control of a web parameter within the search function [CWE-472]. An authenticated user can modify request parameters to access data outside their assigned permissions. The vulnerability affects Synapse Mobility versions 8.0, 8.0.1, 8.0.2, 8.1, and 8.1.1. Because Synapse Mobility is deployed in healthcare environments to view diagnostic images and patient records, unauthorized data access carries direct patient privacy implications.
Critical Impact
An authenticated low-privilege user can escalate access by tampering with search parameters, exposing patient imaging data and related records they are not authorized to view.
Affected Products
- Fujifilm Synapse Mobility 8.0, 8.0.1, 8.0.2
- Fujifilm Synapse Mobility 8.1
- Fujifilm Synapse Mobility 8.1.1
Discovery Timeline
- 2025-08-20 - CVE-2025-54551 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-54551
Vulnerability Analysis
CVE-2025-54551 is a horizontal and vertical privilege escalation issue rooted in improper trust of client-supplied web parameters. The search function within Synapse Mobility accepts parameters that influence authorization decisions or data-scoping logic without adequate server-side verification. An authenticated attacker who alters these parameters can query records beyond their intended scope. In a clinical Picture Archiving and Communication System (PACS) context, this exposes protected health information (PHI), including diagnostic images and study metadata belonging to other patients or departments.
The issue is network-reachable and requires low privileges. No user interaction is needed once the attacker is authenticated. Confidentiality is the primary impact; integrity and availability are not affected according to the CVSS vector.
Root Cause
The underlying weakness is classified as [CWE-472]: External Control of Assumed-Immutable Web Parameter. Application logic treats parameters supplied by the client as trusted authorization context rather than re-validating them server-side against the authenticated session. When the search endpoint constructs a query, it honors user-controlled identifiers or scope parameters without confirming the caller has permission to access the referenced objects.
Attack Vector
Exploitation requires an authenticated session on the Synapse Mobility web interface. The attacker intercepts a legitimate search request using a web proxy and modifies parameter values such as user identifiers, role indicators, patient identifiers, or study scopes. The server processes the modified request and returns records that should be inaccessible to the caller. Refer to the Fujifilm Mobility Vulnerability Notification and JVN #JVNVU94286093 Advisory for vendor-authored technical detail.
Detection Methods for CVE-2025-54551
Indicators of Compromise
- Search or query requests from a single authenticated session returning records outside that user's assigned facility, department, or patient panel.
- Repeated HTTP requests to Synapse Mobility search endpoints with iterated or enumerated identifier values in query parameters.
- Unusual volumes of study retrievals or metadata reads originating from low-privilege user accounts.
Detection Strategies
- Enable and review Synapse Mobility application-level audit logs for search operations, correlating requesting user, requested resource owner, and authorization outcome.
- Deploy a Web Application Firewall (WAF) rule to flag parameter tampering patterns on search endpoints, such as unexpected numeric ranges or role indicator strings.
- Baseline normal query behavior per user role and alert on deviations, such as a technician account issuing physician-scoped queries.
Monitoring Recommendations
- Forward Synapse Mobility web server and application logs to a centralized log platform for retention and correlation with identity events.
- Monitor authentication activity for compromised or shared credentials that could be leveraged to abuse the search function.
- Track outbound data volumes from Synapse Mobility servers to detect bulk study exfiltration following privilege escalation.
How to Mitigate CVE-2025-54551
Immediate Actions Required
- Inventory all Synapse Mobility deployments and identify hosts running versions 8.0, 8.0.1, 8.0.2, 8.1, or 8.1.1.
- Restrict network access to the Synapse Mobility web interface to trusted clinical networks and VPN users only.
- Review recent search and query audit logs for evidence of parameter manipulation or cross-tenant data access.
- Rotate credentials for accounts showing anomalous query patterns.
Patch Information
Fujifilm has published remediation guidance in the Fujifilm Mobility Vulnerability Notification. Customers should contact Fujifilm Healthcare support to obtain the appropriate fixed release for their deployment and follow the vendor's upgrade instructions. Additional coordination detail is available in the JVN #JVNVU94286093 Advisory.
Workarounds
- Limit Synapse Mobility access to authenticated users on isolated network segments until patches are applied.
- Enforce least-privilege role assignments so that any parameter tampering exposes the smallest possible dataset.
- Enable verbose access logging on the web tier and reverse proxy to preserve forensic evidence of query manipulation.
- Consider deploying a reverse proxy or WAF policy that validates search parameter shape and rejects unexpected fields.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.