Source: cve@mitre.org
Cross-site scripting (XSS) vulnerability in data/hybrid/i_hybrid.php in Open Constructor 3.12.0 allows remote authenticated users to inject arbitrary web script or HTML via the header parameter.
Open Constructor 3.12.0 is vulnerable to a cross-site scripting (XSS) attack, allowing authenticated attackers to inject malicious HTML or JavaScript into the application. This vulnerability, exploitable via the header parameter, could lead to session hijacking, data theft, or defacement of the website.
Step 1: Authentication: The attacker must first authenticate to the Open Constructor application, likely by providing valid credentials.
Step 2: Payload Injection: The attacker crafts a malicious payload containing JavaScript code (e.g., <script>alert('XSS')</script>) and injects it into the header parameter of a request to data/hybrid/i_hybrid.php.
Step 3: Request Submission: The attacker submits the crafted request to the vulnerable application.
Step 4: Server-Side Processing: The server receives the request and processes it, likely including the header parameter in the response.
Step 5: Response Generation: The server generates an HTML response that includes the attacker's injected JavaScript code within the context of the web page.
Step 6: Client-Side Execution: When a legitimate user views the page or interacts with a component that renders the malicious header, their browser executes the injected JavaScript code, leading to the XSS vulnerability being exploited. This could lead to session hijacking, data theft, or defacement.
The vulnerability lies in the data/hybrid/i_hybrid.php file, where the application fails to properly sanitize user-supplied input from the header parameter before rendering it in the web page. Specifically, the code likely directly incorporates the header parameter's content into the HTML response without adequate escaping or filtering. This allows an attacker to inject arbitrary HTML tags, including <script> tags, which execute malicious JavaScript code in the victim's browser. The root cause is a lack of input validation and output encoding, a common security flaw. The application trusts user-supplied data without verifying its safety, leading to the XSS vulnerability.
While specific APT groups are not directly linked to this CVE, the ease of exploitation makes it attractive to a wide range of attackers, from script kiddies to more sophisticated actors. This vulnerability could be leveraged in conjunction with other attacks to achieve broader objectives. CISA KEV status: Likely not present, given the age and specific nature of the vulnerability.
Web server logs analysis: Look for suspicious HTTP requests to data/hybrid/i_hybrid.php containing potentially malicious JavaScript code within the header parameter (e.g., <script>, onerror, onload).
Intrusion Detection System (IDS) and Intrusion Prevention System (IPS) rules: Implement rules to detect XSS payloads in HTTP requests, specifically targeting the header parameter.
Web Application Firewall (WAF) logs: Review WAF logs for blocked requests containing XSS attempts.
Network traffic analysis: Examine network traffic for unusual patterns, such as a high volume of requests to the vulnerable endpoint or requests containing suspicious JavaScript.
File integrity monitoring: Monitor the data/hybrid/i_hybrid.php file for unauthorized modifications.
Upgrade to a patched version of Open Constructor that addresses the XSS vulnerability. If an upgrade is not possible, apply the vendor's recommended patch or workaround.
Implement robust input validation: Sanitize all user-supplied input, including the header parameter, to remove or encode potentially malicious characters (e.g., <, >, &, ', ").
Implement output encoding: Encode all output to prevent the browser from interpreting user-supplied data as HTML or JavaScript. Use appropriate encoding based on the context (e.g., HTML encoding, JavaScript encoding).
Use a Web Application Firewall (WAF): Deploy a WAF to filter malicious requests and prevent XSS attacks.
Implement Content Security Policy (CSP): Configure CSP to restrict the sources from which the browser can load resources (e.g., scripts, stylesheets, images). This can mitigate the impact of XSS attacks.
Regularly scan the application for vulnerabilities using automated tools.
Conduct penetration testing to identify and address security weaknesses.