CVE-2025-53912: Critical Arbitrary File Read Flaw Exposes MedDream PACS Systems

Vulnerability Overview

CVE ID: CVE-2025-53912
Affected Product: MedDream PACS Premium
Affected Version: 7.3.6.870
Vulnerability Type: Arbitrary File Read
Severity: Critical
CVSS v3.1 Base Score: 9.6
Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Impact: High confidentiality and integrity impact
Exploit Availability: Publicly known techniques (educational and defensive context only)

Executive Summary

CVE-2025-53912 is a critical security vulnerability in MedDream PACS Premium that allows an authenticated but low-privileged user to read arbitrary files from the underlying server filesystem. The issue exists in a web-accessible endpoint that fails to properly validate user-supplied file paths before opening and returning file contents.

If exploited, this vulnerability can expose highly sensitive data including system configuration files, application secrets, database credentials, encryption keys, and patient medical information. In healthcare environments, this creates a serious risk of regulatory violations, patient data breaches, and further system compromise.

Because exploitation requires very little effort and no advanced techniques, this vulnerability should be treated as urgent.

Technical Description

The vulnerability resides in the PACS web application component responsible for serving encapsulated documents to users. This component accepts a request parameter that specifies the file path of the document to be retrieved.

Due to missing or insufficient input validation, the application does not restrict this parameter to an expected directory or file type. As a result, an attacker can supply an arbitrary filesystem path and cause the server to read and return the contents of that file.

This behavior constitutes an arbitrary file read condition, where external input directly controls which file the application accesses.

Root Cause

User-controlled input is passed directly to file handling logic
No canonicalization or normalization of file paths
No allow-list of permitted directories
No restriction on absolute paths or traversal sequences
No enforcement of file type or extension validation

How Exploitation Works

An attacker gains access to the PACS web interface using a low-privileged account.
The attacker sends an HTTP request to the vulnerable endpoint.
The request includes a crafted path parameter referencing a local system file.
The application reads the file and returns its contents in the HTTP response.
The attacker extracts sensitive information from the response.

This process can be repeated to harvest multiple files and build a full picture of the system configuration.

Potential Impact

Successful exploitation can lead to:

Exposure of patient medical data (PHI)
Disclosure of application configuration files
Theft of database credentials
Exposure of encryption keys or certificates
Disclosure of operating system files
Secondary compromise using leaked credentials
Lateral movement within the healthcare network

Because PACS systems often run with elevated filesystem permissions, the scope of readable files can be extensive.

Proof of Concept and Exploit Availability

Publicly available proof-of-concept techniques demonstrate that the vulnerability is straightforward to exploit by manipulating request parameters. These techniques are widely discussed for educational and defensive purposes.

Security teams should assume that attackers are aware of this flaw and capable of exploiting it without specialized tools.

Detection Strategy

Relevant Log Sources

To detect exploitation attempts, monitor the following:

Web server access logs (Apache, Nginx, IIS)
Reverse proxy and load balancer logs
Web Application Firewall (WAF) logs
Application authentication and audit logs
SIEM or centralized logging platform

Indicators of Exploitation

Look for:

Requests to /Pacs/encapsulatedDoc.php
Presence of a path= parameter in the query string
Absolute filesystem paths in parameters
Directory traversal patterns (../, ..\, encoded equivalents)
Requests for system or configuration files
Unusual response sizes
Repeated requests from the same source IP
Activity outside normal business hours

WAF Signatures and Detection Rules

1. Primary Blocking Rule

Block requests that attempt to control file paths.

IF request.uri CONTAINS "/Pacs/encapsulatedDoc.php"
AND request.query CONTAINS "path="
AND (
     path CONTAINS "../"
  OR path CONTAINS "..\"
  OR path CONTAINS "%2e%2e"
  OR path MATCHES "^[A-Za-z]:\\"
  OR path STARTS_WITH "/"
)
THEN BLOCK

2. ModSecurity / OWASP CRS-Style Rule

SecRule REQUEST_URI "@contains /Pacs/encapsulatedDoc.php" \
 "id:10053912,phase:2,block,log, \
  msg:'CVE-2025-53912 MedDream PACS Arbitrary File Read attempt', \
  chain"

SecRule ARGS:path "@rx (\.\./|\.\.\\|%2e%2e|^[A-Za-z]:\\|^/)"

3. Sensitive File Name Detection Rule

IF request.uri CONTAINS "/Pacs/encapsulatedDoc.php"
AND request.query MATCHES "(passwd|shadow|hosts|\.env|\.key|\.pem|\.conf|web\.config|application\.properties)"
THEN BLOCK

4. Enumeration and Abuse Detection

IF request.uri CONTAINS "/Pacs/encapsulatedDoc.php"
AND requests_from_same_ip > 5 WITHIN 60 seconds
THEN BLOCK OR RATE-LIMIT

5. Role-Based Abuse Protection

IF request.uri CONTAINS "/Pacs/encapsulatedDoc.php"
AND authenticated_user_role NOT IN ("admin","authorized_clinical_user")
AND request.query CONTAINS "path="
THEN BLOCK

Logging Requirements

Ensure the following fields are logged and retained:

Source IP address
Authenticated username or session ID
Full request URI
Decoded query parameters
HTTP response status
Response size
Timestamp

These fields are essential for incident investigation and compliance reporting.

Incident Response Guidance

If exploitation is suspected:

Immediately block offending IPs and sessions.
Review historical logs for similar requests.
Identify which files were accessed.
Assume exposed credentials are compromised.
Rotate credentials and keys immediately.
Isolate the affected system if necessary.
Apply the vendor patch or upgrade.
Perform a post-incident review.

Mitigation and Hardening Recommendations

Apply the official vendor patch or upgrade immediately.
Restrict PACS web access to trusted networks only.
Place the application behind a WAF.
Enforce least-privilege access for PACS users.
Monitor logs continuously for anomalous access.
Conduct regular security assessments of PACS infrastructure.

Official Patch / Upgrade Link

The only authoritative source for remediation is the vendor’s official site.
Use the product, download, or change-log pages to obtain the fixed version.

https://meddream.com

Final Takeaway

CVE-2025-53912 represents a high-risk vulnerability with real-world impact potential, especially in healthcare environments. The simplicity of exploitation combined with the sensitivity of PACS data makes this issue a priority for immediate remediation.

Organizations running affected versions should assume exposure until patched and actively hunt for signs of exploitation.