CVE-2025-58095: MedDream PACS Premium XSS Vulnerability

CVE-2025-58095 Overview

CVE-2025-58095 is a reflected cross-site scripting (XSS) vulnerability discovered in the config.php functionality of MedDream PACS Premium 7.3.6.870. This vulnerability specifically affects the imagedir parameter and allows attackers to execute arbitrary JavaScript code in the context of a victim's browser session by crafting malicious URLs.

MedDream PACS is a medical imaging solution used in healthcare environments for viewing and managing medical images. The presence of an XSS vulnerability in such software poses significant risks, as healthcare systems often contain sensitive patient data and may be subject to strict regulatory compliance requirements such as HIPAA.

Critical Impact

Attackers can execute arbitrary JavaScript code in victim browsers, potentially leading to session hijacking, credential theft, or unauthorized access to sensitive medical imaging data within healthcare environments.

Affected Products

• MedDream PACS Premium 7.3.6.870
• MedDream PACS Premium (earlier versions may also be affected)

Discovery Timeline

• 2026-01-20 - CVE-2025-58095 published to NVD
• 2026-01-20 - Last updated in NVD database

Technical Details for CVE-2025-58095

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting (XSS). The reflected XSS vulnerability exists because the config.php script fails to properly sanitize user-supplied input in the imagedir parameter before including it in the HTTP response.

When a user clicks on a maliciously crafted URL containing JavaScript payload in the imagedir parameter, the server reflects this unsanitized input back to the browser, which then executes the injected script in the context of the vulnerable application's domain.

In healthcare environments, successful exploitation could allow attackers to steal session cookies, capture authentication credentials, perform actions on behalf of authenticated users, or redirect users to malicious sites designed to harvest additional credentials.

Root Cause

The root cause of this vulnerability is improper input validation and output encoding in the config.php file. The application fails to sanitize the imagedir parameter value before reflecting it in the HTML response. Without proper HTML entity encoding or input validation, the parameter becomes a vector for injecting malicious scripts.

Proper mitigation requires implementing context-aware output encoding and validating that input parameters contain only expected characters and formats before processing them.

Attack Vector

The attack requires user interaction—specifically, the victim must click on a maliciously crafted URL or be redirected to it through social engineering or other means. The attacker constructs a URL containing JavaScript code in the imagedir parameter, which is then reflected by the server and executed by the victim's browser.

Attack scenarios include:

• Phishing emails containing malicious links targeting healthcare staff
• Compromised websites redirecting users to the malicious URL
• Malicious advertisements or forum posts containing crafted links

The vulnerability is exploited by appending a JavaScript payload to the imagedir parameter in requests to the config.php endpoint. When the server reflects this input without proper sanitization, the browser interprets and executes the injected script. Technical details and proof-of-concept information can be found in the Talos Intelligence Vulnerability Report.

Detection Methods for CVE-2025-58095

Indicators of Compromise

• Unusual HTTP requests to config.php containing script tags or JavaScript event handlers in the imagedir parameter
• Web server logs showing encoded JavaScript payloads such as %3Cscript%3E or javascript: in query strings
• User reports of unexpected pop-ups or behavior when accessing MedDream PACS
• Browser console errors indicating blocked inline scripts (if CSP is partially implemented)

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block requests containing common XSS patterns in the imagedir parameter
• Configure SIEM alerts for HTTP requests to config.php containing suspicious characters such as <, >, script, onerror, or onload
• Deploy endpoint detection solutions to monitor for anomalous browser behavior following access to MedDream PACS URLs
• Conduct regular security scans using tools capable of detecting reflected XSS vulnerabilities

Monitoring Recommendations

• Enable detailed web server access logging and monitor for requests with encoded special characters in query parameters
• Implement Content Security Policy (CSP) headers and monitor violation reports for attempted script injections
• Configure browser-based protections and monitor for XSS filter trigger events
• Establish baseline network behavior and alert on deviations in traffic patterns to/from the MedDream PACS server

How to Mitigate CVE-2025-58095

Immediate Actions Required

• Review and restrict network access to MedDream PACS Premium instances, limiting exposure to trusted networks only
• Implement a Web Application Firewall (WAF) with rules specifically blocking XSS patterns in the imagedir parameter
• Educate users about the risks of clicking on unknown or suspicious links, particularly those targeting the PACS system
• Monitor the vendor and Talos Intelligence advisory for patch availability

Patch Information

As of the last NVD update on 2026-01-20, organizations should consult MedDream directly or monitor their official channels for security patches addressing CVE-2025-58095. Review the Talos Intelligence Vulnerability Report for the latest remediation guidance.

Workarounds

• Deploy a reverse proxy or WAF in front of MedDream PACS to filter and block requests containing script tags or JavaScript event handlers
• Implement strict Content Security Policy (CSP) headers to prevent execution of inline scripts
• Restrict access to config.php to authenticated and authorized users only
• Consider network segmentation to isolate the PACS system from general user networks

# Example Apache configuration to add Content Security Policy headers
<IfModule mod_headers.c>
    Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'"
    Header set X-XSS-Protection "1; mode=block"
    Header set X-Content-Type-Options "nosniff"
</IfModule>