CVE-2026-4914: Ivanti N-ITSM Stored XSS Vulnerability

CVE-2026-4914 Overview

A stored Cross-Site Scripting (XSS) vulnerability has been identified in Ivanti Neurons for ITSM (N-ITSM) before version 2025.4. This vulnerability allows a remote authenticated attacker to inject malicious scripts that persist within the application, potentially enabling the attacker to obtain limited information from other user sessions. Exploitation of this vulnerability requires user interaction, as victims must navigate to pages containing the stored malicious payload.

Critical Impact

Authenticated attackers can persist malicious scripts in the application to steal session information from other users, potentially leading to unauthorized access to sensitive ITSM data and user impersonation.

Affected Products

• Ivanti Neurons for ITSM (N-ITSM) versions prior to 2025.4

Discovery Timeline

• April 14, 2026 - CVE-2026-4914 published to NVD
• April 14, 2026 - Last updated in NVD database

Technical Details for CVE-2026-4914

Vulnerability Analysis

This stored XSS vulnerability (CWE-79) in Ivanti Neurons for ITSM represents a persistent injection flaw where malicious script content can be stored within the application's data store. Unlike reflected XSS attacks that require victims to click specially crafted links, stored XSS payloads are automatically served to users when they access affected pages, making them particularly dangerous in multi-user enterprise environments like IT Service Management platforms.

The vulnerability requires authentication, meaning attackers must first obtain valid credentials or already have legitimate access to the N-ITSM system. Once authenticated, they can inject malicious JavaScript code that gets stored in the application database. When other users—potentially including administrators—view the affected content, the malicious script executes in their browser context.

The scope is changed, meaning the vulnerability in the vulnerable component (N-ITSM) impacts resources beyond its security scope, affecting other user sessions. The attack can lead to limited confidentiality and integrity impacts through session information theft and potential data manipulation within the affected user's browser context.

Root Cause

The root cause of CVE-2026-4914 is improper input validation and output encoding in Ivanti Neurons for ITSM. The application fails to adequately sanitize user-supplied input before storing it and does not properly encode this data when rendering it back to users. This allows attackers to inject HTML and JavaScript code that the browser interprets as legitimate application content rather than user-generated data.

Attack Vector

The attack is network-based and requires the following conditions:

1. Authentication Required: The attacker must have valid credentials for the Ivanti N-ITSM instance
2. Payload Injection: The attacker identifies an input field or parameter that stores content without proper sanitization
3. Script Storage: Malicious JavaScript is submitted and stored in the application's database
4. Victim Interaction: Other authenticated users navigate to pages that render the stored malicious content
5. Session Compromise: The injected script executes in victims' browsers, potentially exfiltrating session tokens, cookies, or other sensitive information

The vulnerability can be exploited to capture session identifiers, perform actions on behalf of victims, modify displayed content, or redirect users to malicious sites. In an ITSM context, this could expose sensitive ticket information, service configurations, or user details.

Detection Methods for CVE-2026-4914

Indicators of Compromise

• Unusual JavaScript code or HTML tags appearing in ITSM ticket fields, comments, or user-generated content areas
• Browser console errors indicating blocked inline scripts (if CSP is partially implemented)
• Unexpected outbound network requests from user browsers to unknown external domains
• User reports of suspicious pop-ups or redirects when accessing specific ITSM pages

Detection Strategies

• Review web application logs for input containing common XSS patterns such as <script>, javascript:, event handlers like onerror or onload, and encoded variants
• Implement Content Security Policy (CSP) headers and monitor CSP violation reports for attempted script injections
• Deploy web application firewall (WAF) rules to detect and block XSS payload patterns
• Conduct periodic security scans of stored content in the ITSM database for malicious script fragments

Monitoring Recommendations

• Enable verbose logging for all user input submissions in Ivanti N-ITSM
• Monitor authentication events for unusual patterns that might indicate compromised credentials being used to inject payloads
• Implement browser-based XSS auditing and monitor for triggered alerts
• Review session activity logs for anomalous behavior following page views that could indicate post-exploitation activity

How to Mitigate CVE-2026-4914

Immediate Actions Required

• Upgrade Ivanti Neurons for ITSM to version 2025.4 or later immediately
• Review existing stored content in the ITSM database for potentially malicious scripts
• Implement or strengthen Content Security Policy headers to prevent inline script execution
• Audit user accounts with content creation privileges and enforce principle of least privilege

Patch Information

Ivanti has released version 2025.4 of Neurons for ITSM which addresses this stored XSS vulnerability. Organizations should apply this update as soon as possible following their change management procedures. Detailed patch information and installation guidance is available in the Ivanti Security Advisory for CVE-2026-4913 and CVE-2026-4914.

Workarounds

• Implement strict Content Security Policy (CSP) headers that disallow inline script execution (script-src 'self')
• Deploy a web application firewall (WAF) with XSS filtering rules in front of the N-ITSM instance
• Restrict user permissions to limit which accounts can create or modify content in areas susceptible to XSS
• Educate users about the risks of interacting with suspicious content and to report anomalous application behavior

# Example CSP header configuration for Apache
# Add to httpd.conf or .htaccess as a temporary mitigation
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; frame-ancestors 'self';"