CVE-2025-53397: Advantech iView XSS Vulnerability

CVE-2025-53397 Overview

CVE-2025-53397 is a reflected cross-site scripting (XSS) vulnerability affecting Advantech iView, a network management software widely deployed in industrial control environments. The flaw exists in all versions prior to 5.7.05 build 7057 and stems from improper neutralization of user-supplied input rendered back into the browser [CWE-79]. An attacker can craft a malicious URL that, when clicked by an authenticated user, executes arbitrary JavaScript in the victim's browser session. Successful exploitation can lead to session data theft, credential harvesting, or unauthorized actions within the iView management interface. The Cybersecurity and Infrastructure Security Agency (CISA) published advisory ICSA-25-191-08 to notify operational technology (OT) asset owners.

Critical Impact
Attackers can execute unauthorized scripts in the browser of an authenticated iView user, enabling information disclosure and hijacking of administrative sessions in industrial network management environments.

Affected Products

Advantech iView versions prior to 5.7.05 build 7057
Advantech iView network management software deployed in industrial control system (ICS) environments
Systems relying on iView for SNMP-based device monitoring and configuration

Discovery Timeline

2025-07-11 - CVE-2025-53397 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-53397

Vulnerability Analysis

The vulnerability is a reflected XSS flaw in the Advantech iView web interface. The application fails to properly sanitize or encode user-controlled input before including it in HTTP responses. When a victim's browser renders the response, injected script content executes within the security context of the iView application. Because iView typically runs with elevated privileges in ICS management workflows, script execution can pivot into administrative actions such as querying device inventories, modifying SNMP configurations, or exfiltrating session cookies.

Root Cause

The root cause is improper neutralization of input during web page generation, mapped to [CWE-79]. One or more request parameters in the iView web application are reflected directly into HTML output without contextual output encoding. No content security policy (CSP) or input validation routine prevents <script> payloads or event handler attributes from being embedded in server responses.

Attack Vector

Exploitation requires user interaction. An attacker crafts a URL containing a malicious payload targeting a vulnerable iView endpoint and delivers it via phishing, chat, or a compromised web page. When an authenticated iView user follows the link, the payload reflects into the response and executes in their browser. The attacker does not need existing credentials, but the victim must be authenticated for the impact to reach sensitive management data. Verified exploit code is not publicly available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

No verified proof-of-concept code is publicly available for this vulnerability. Refer to the CISA ICS Advisory ICSA-25-191-08 for authoritative technical details.

Detection Methods for CVE-2025-53397

Indicators of Compromise

HTTP requests to iView endpoints containing URL-encoded <script> tags, javascript: URIs, or onerror/onload event handlers in query parameters
Unexpected outbound requests from iView administrator workstations to attacker-controlled domains shortly after clicking external links
Web server access logs showing suspicious GET requests with reflected payloads originating from external referrers

Detection Strategies

Deploy web application firewall (WAF) rules that inspect request parameters to the iView interface for XSS payload patterns
Monitor browser telemetry and endpoint logs for JavaScript execution originating from the iView domain that contacts external hosts
Correlate phishing email indicators with subsequent access to iView URLs containing anomalous query strings

Monitoring Recommendations

Enable verbose HTTP request logging on the iView server and forward logs to a centralized analytics platform for retention and search
Alert on iView sessions that generate unusual API calls immediately after loading a page with external referrer headers
Track user-agent and source IP patterns for iView administrative accounts to identify session anomalies

How to Mitigate CVE-2025-53397

Immediate Actions Required

Upgrade Advantech iView to version 5.7.05 build 7057 or later using the vendor-supplied firmware package
Restrict network access to the iView management interface to trusted administrative subnets only
Instruct iView administrators to avoid clicking untrusted links while authenticated to the management console

Patch Information

Advantech has released a fixed version of iView addressing this vulnerability. Download the patched build from the Advantech Firmware Advisory. CISA guidance is available in the CISA ICS Advisory ICSA-25-191-08.

Workarounds

Place the iView web interface behind a reverse proxy or WAF that filters XSS payloads in query parameters and POST bodies
Enforce network segmentation so that iView is unreachable from user workstations that also access external email and web content
Require administrators to use dedicated privileged access workstations (PAWs) with restricted browsing when managing iView

bash

# Example: restrict iView access to a management subnet using iptables
iptables -A INPUT -p tcp --dport 8080 -s 10.10.50.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP