CVE-2025-54814: MedDream PACS Premium XSS Vulnerability

CVE-2025-54814 Overview

A reflected cross-site scripting (XSS) vulnerability has been identified in the modifyAutopurgeFilter functionality of MedDream PACS Premium 7.3.6.870. This vulnerability allows attackers to craft malicious URLs that, when clicked by an authenticated user, execute arbitrary JavaScript code within the context of the victim's browser session. MedDream PACS is a medical imaging software commonly used in healthcare environments, making this vulnerability particularly concerning due to the sensitive nature of patient data that could be exposed.

Critical Impact

Attackers can execute arbitrary JavaScript code in the context of authenticated healthcare users, potentially leading to session hijacking, credential theft, or unauthorized access to sensitive medical imaging data.

Affected Products

• MedDream PACS Premium version 7.3.6.870

Discovery Timeline

• 2026-01-20 - CVE-2025-54814 published to NVD
• 2026-01-20 - Last updated in NVD database

Technical Details for CVE-2025-54814

Vulnerability Analysis

This reflected XSS vulnerability (CWE-79) resides in the modifyAutopurgeFilter functionality of MedDream PACS Premium. The vulnerability occurs because user-supplied input is not properly sanitized before being reflected back in the HTTP response. When a victim clicks on a specially crafted URL, the malicious JavaScript payload embedded in the URL parameters is executed in the victim's browser within the security context of the MedDream PACS application.

In healthcare environments where MedDream PACS operates, successful exploitation could allow attackers to steal session tokens, capture credentials, perform actions on behalf of authenticated medical staff, or access protected health information (PHI) displayed within the PACS interface.

Root Cause

The root cause of this vulnerability is improper input validation and output encoding in the modifyAutopurgeFilter functionality. User-controlled input passed through URL parameters is reflected in the application's response without adequate sanitization, allowing malicious script tags or JavaScript event handlers to be injected and executed in the victim's browser.

Attack Vector

This vulnerability is exploited via network-based attacks where an attacker must convince a victim to click on a maliciously crafted URL. The attack requires user interaction, as the victim must navigate to the attacker-controlled link while authenticated to the MedDream PACS application. The attacker can deliver the malicious URL through phishing emails, social engineering, or by embedding it in compromised websites frequented by healthcare workers.

The exploitation process typically involves:

1. Attacker crafts a malicious URL containing JavaScript payload targeting the modifyAutopurgeFilter endpoint
2. Victim receives the link through phishing or social engineering
3. Victim clicks the link while authenticated to MedDream PACS
4. Malicious JavaScript executes in the victim's browser context
5. Attacker can steal session cookies, perform actions as the victim, or exfiltrate sensitive data

For detailed technical information about this vulnerability, refer to the Talos Intelligence Vulnerability Report.

Detection Methods for CVE-2025-54814

Indicators of Compromise

• Suspicious URL patterns containing encoded JavaScript or script tags targeting the modifyAutopurgeFilter endpoint
• Unusual HTTP requests to MedDream PACS containing XSS payloads in URL parameters
• Web server logs showing requests with encoded characters such as %3Cscript%3E or JavaScript event handlers
• Anomalous outbound connections from user browsers after accessing MedDream PACS

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block common XSS payload patterns in requests to the MedDream PACS application
• Monitor HTTP request logs for suspicious parameters containing script tags, event handlers, or encoded JavaScript
• Deploy browser-based security monitoring to detect unauthorized script execution within the PACS application context
• Utilize SIEM correlation rules to identify patterns consistent with XSS attack campaigns targeting medical imaging systems

Monitoring Recommendations

• Enable detailed logging for all HTTP requests to the MedDream PACS modifyAutopurgeFilter endpoint
• Configure alerts for requests containing common XSS indicators such as <script>, javascript:, or onerror=
• Monitor for unusual data exfiltration patterns or session token theft following PACS access
• Review Content Security Policy (CSP) violation reports if implemented

How to Mitigate CVE-2025-54814

Immediate Actions Required

• Review access logs for any evidence of XSS exploitation attempts against the modifyAutopurgeFilter functionality
• Educate healthcare staff about phishing risks and the dangers of clicking untrusted links
• Implement network-level URL filtering to block access to known malicious domains
• Consider restricting access to MedDream PACS to trusted internal networks only until a patch is applied

Patch Information

Security teams should monitor MedDream vendor communications and the Talos Intelligence Vulnerability Report for patch availability. Apply vendor-provided security updates as soon as they become available for MedDream PACS Premium version 7.3.6.870.

Workarounds

• Deploy a web application firewall (WAF) with XSS filtering rules in front of the MedDream PACS application
• Implement Content Security Policy (CSP) headers to restrict inline script execution
• Limit network access to MedDream PACS to authorized IP ranges or VPN connections only
• Enable HTTP-only and Secure flags on session cookies to reduce the impact of potential session hijacking

# Example WAF rule configuration for ModSecurity
SecRule REQUEST_URI "@contains modifyAutopurgeFilter" \
    "id:100001,\
    phase:1,\
    deny,\
    status:403,\
    log,\
    msg:'Potential XSS attempt on modifyAutopurgeFilter',\
    chain"
    SecRule ARGS "@rx (?i)(<script|javascript:|onerror=|onload=)" \
        "t:urlDecodeUni,t:htmlEntityDecode"