CVE-2023-34855 in AC Centralized Management Platform
Summary
by MITRE • 06/12/2023
A Cross Site Scripting (XSS) vulnerability in Youxun Electronic Equipment (Shanghai) Co., Ltd AC Centralized Management Platform v1.02.040 allows attackers to execute arbitrary code via uploading a crafted HTML file to the interface /upfile.cgi.
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Analysis
by VulDB Data Team • 01/09/2026
This cross site scripting vulnerability exists within the AC Centralized Management Platform version 1.02.040 produced by Youxun Electronic Equipment (Shanghai) Co., Ltd. The flaw manifests in the file upload functionality at the /upfile.cgi interface where the system fails to properly validate or sanitize user-supplied input. This weakness enables remote attackers to bypass security controls and inject malicious scripts into the web application's execution environment. The vulnerability classifies as CWE-79 - Improper Neutralization of Input During Web Page Generation, which represents one of the most prevalent web application security flaws according to the CWE database. The attack vector specifically targets the file upload mechanism where an attacker can craft a malicious HTML file containing embedded JavaScript code that gets executed when the file is processed or displayed within the platform's web interface.
The operational impact of this vulnerability extends beyond simple script execution as it provides attackers with a potential foothold for more sophisticated attacks. When an attacker successfully uploads a malicious HTML file through the vulnerable /upfile.cgi endpoint, the injected scripts can execute within the context of other users' sessions, potentially leading to session hijacking, data theft, or privilege escalation. The vulnerability enables attackers to perform persistent XSS attacks that can affect multiple users who view the uploaded content, creating a significant risk for the platform's users and administrators. According to ATT&CK framework, this vulnerability maps to T1059.007 - Command and Scripting Interpreter: JavaScript, as it leverages JavaScript execution capabilities within the web browser environment. The attack can be particularly dangerous in enterprise environments where the centralized management platform controls critical infrastructure components.
Mitigation strategies should focus on implementing comprehensive input validation and sanitization mechanisms at the point of file upload. The system must enforce strict content type validation, reject files with potentially dangerous extensions, and sanitize all uploaded content to remove or escape any executable script tags. Implementing proper output encoding when displaying user-supplied content prevents XSS payloads from executing in the browser context. Security measures should include deploying web application firewalls that can detect and block malicious file upload attempts, implementing Content Security Policy headers to restrict script execution, and conducting regular security assessments of the upload functionality. The platform should also implement file integrity checks and maintain proper access controls to limit upload privileges to authorized personnel only. Organizations should consider implementing a secure file upload architecture that separates uploaded files from the web application's execution environment, ensuring that even if malicious content is uploaded, it cannot directly execute within the application's context. Additionally, regular security updates and patches should be applied to address known vulnerabilities in third-party components and ensure the platform maintains current security standards.