CVE-2025-24344 in ctrlX OS
Summary
by MITRE • 04/30/2025
A vulnerability in the error notification messages of the web application of ctrlX OS allows a remote unauthenticated attacker to inject arbitrary HTML tags and, possibly, execute arbitrary client-side code in the context of another user's browser via a crafted HTTP request.
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Analysis
by VulDB Data Team • 04/30/2025
This vulnerability resides within the ctrlX OS web application's error handling mechanism, representing a critical cross-site scripting flaw that enables remote code execution through maliciously crafted HTTP requests. The vulnerability stems from insufficient input validation and output encoding in the application's error notification system, which fails to properly sanitize user-supplied data before rendering it in web responses. Attackers can exploit this weakness by submitting specially crafted requests that trigger error conditions, allowing them to inject HTML tags and JavaScript code into the error messages displayed to users. The flaw operates at the application layer where user inputs are processed without adequate security measures to prevent malicious content from being executed in the context of other users' browsers, making it particularly dangerous in multi-user environments where session management and access controls are already in place.
The technical implementation of this vulnerability aligns with CWE-79 - Cross-site Scripting, specifically targeting the web application's error handling routines where user-controllable data is directly embedded into HTML responses. This weakness creates a persistent threat vector that can be exploited without authentication requirements, as the error messages are generated regardless of user authorization status. The attack chain begins with an unauthenticated attacker sending crafted HTTP requests that trigger specific error conditions within the ctrlX OS web interface, causing the system to render malicious content directly in the user's browser session. The injection occurs in the error notification context where HTML entities are not properly escaped or filtered, allowing attackers to execute arbitrary client-side code through script tags, event handlers, or other malicious HTML constructs that can persist across user sessions.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it provides attackers with the capability to hijack user sessions, execute unauthorized commands, and potentially establish persistent access to the affected system. Remote attackers can leverage this vulnerability to perform session hijacking attacks, redirect users to malicious websites, or inject malicious scripts that can harvest credentials and sensitive information. The vulnerability is particularly concerning in industrial control environments where ctrlX OS is commonly deployed, as it could enable attackers to compromise critical infrastructure operations by manipulating error messages to deliver malicious payloads to authorized personnel. The lack of authentication requirements for exploitation means that attackers can target any user who encounters the vulnerable error messages, potentially affecting multiple users within a single session or across different systems.
Mitigation strategies should focus on implementing comprehensive input validation and output encoding mechanisms throughout the web application's error handling processes. Security measures must include the implementation of Content Security Policy headers to restrict script execution and prevent unauthorized code injection, along with proper HTML entity encoding for all user-supplied data in error messages. Organizations should deploy web application firewalls to monitor and filter malicious requests that may trigger error conditions, while also implementing regular security assessments to identify similar vulnerabilities in other application components. The solution approach should align with ATT&CK technique T1566 - Phishing, as attackers may use this vulnerability to deliver malicious payloads through crafted error notifications, making it essential to establish robust sanitization processes that prevent HTML injection in all user-facing application responses. Additionally, implementing proper error handling that does not expose system internals or user data in error messages can significantly reduce the attack surface and prevent exploitation of similar vulnerabilities in the future.