CVE-2026-33240 in iTop
Summary
by MITRE • 08/22/2026
Combodo iTop is a web based IT service management tool. Prior to 3.2.3, there was a Reflected Cross-Site Scripting (XSS) vulnerability in the foreign key search criteria API. This issue has been fixed in version 3.2.3.
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Analysis
by VulDB Data Team • 08/22/2026
Combodo iTop is an open-source IT service management platform designed to help organizations manage their IT infrastructure, services, and support processes through a web-based interface. The software provides functionalities for incident tracking, problem management, change control, and asset inventory, making it a critical component in many enterprise IT environments. As with any complex web application that handles user input and renders dynamic content, the integrity of data processing and output encoding is paramount to preventing security vulnerabilities such as Cross-Site Scripting.
A reflected cross-site scripting vulnerability was identified within the foreign key search criteria API prior version 3.2.3 of Combodo iTop. This specific flaw arises from insufficient sanitization or validation of user-supplied input passed through the search parameters for foreign keys. In a typical web application architecture, when a user submits data via HTTP requests, such as query strings in URLs or POST body content, the server processes this information to generate dynamic responses. If the application fails to properly encode special characters within these inputs before rendering them back into the HTML response, an attacker can inject malicious client-side scripts. In this case, the vulnerability allows an attacker to craft a specially crafted URL containing JavaScript code as part of the search criteria for a foreign key field. When another user or administrator clicks on this link while authenticated to the iTop instance, their browser executes the injected script in the context of the application's domain.
The operational impact of this reflected XSS vulnerability is significant because it enables attackers to perform actions on behalf of victims who are logged into the system. By executing arbitrary JavaScript code within the victim's session, an attacker can steal sensitive information such as authentication cookies or session tokens, which could lead to account takeover and unauthorized access to confidential IT service management data. Furthermore, the vulnerability allows for phishing attacks where the malicious script redirects users to fraudulent pages designed to harvest credentials. It also facilitates keylogging capabilities that capture keystrokes entered by legitimate users, potentially exposing passwords, ticket details, and other sensitive operational metrics stored within the iTop database. Since this is a reflected XSS rather than persistent storage-based XSS, exploitation requires social engineering tactics such as sending malicious links via email or instant messaging to trick specific targets into triggering the payload.
This vulnerability aligns with CWE-79, which classifies Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. From a tactical perspective within the MITRE ATT&CK framework, this flaw supports techniques related to Client-side Injection and potentially Credential Access through browser session hijacking if cookies are not properly secured against script access. The lack of output encoding represents a fundamental failure in input validation strategies that should be enforced at both the application logic layer and the presentation layer to ensure data integrity during rendering processes.
To mitigate this vulnerability, organizations running versions of Combodo iTop prior to 3.2.3 must upgrade immediately to version 3.2.3 or later where the issue has been resolved through improved input sanitization and output encoding mechanisms. In addition to applying the software patch, administrators should implement defense-in-depth strategies such as deploying a Web Application Firewall that can detect and block common XSS patterns in HTTP requests. Enforcing strict Content Security Policy headers helps restrict the execution of unauthorized scripts within the browser environment, thereby reducing the blast radius even if an injection attempt succeeds. Regular security audits and code reviews focusing on how user inputs are handled before being rendered into HTML responses will further strengthen the application's resilience against similar input validation flaws in future updates or custom modules.