Regularly Update and Patch

Oct 13, 2025 by pynkocean.com 138 views

Yonyou UFIDA ERP-NC V5.0: A Reflected XSS Vulnerability

In the ever-evolving landscape of cybersecurity, vulnerabilities in software applications can have devastating consequences. One such vulnerability, a Reflected Cross-Site Scripting (XSS) flaw, has been identified in Yonyou UFIDA ERP-NC V5.0. This article delves into the details of this vulnerability, its impact, and the steps to mitigate it.

Reflected XSS is a type of web application security vulnerability that occurs when an attacker injects malicious JavaScript code into a vulnerable web application. This code is then reflected back to the user's browser, where it is executed in the context of the victim's session. The attacker can manipulate the user's session, steal sensitive information, or even take control of the user's device.

The Vulnerability in Yonyou UFIDA ERP-NC V5.0

The vulnerability in Yonyou UFIDA ERP-NC V5.0 exists in the menu.jsp page, where user-supplied input is not properly sanitized before being included in the HTML output. The flag parameter, which is passed via the URL, is directly included in the HTML output without proper sanitization. This allows an attacker to inject arbitrary JavaScript code, which is then executed in the context of the victim's browser.

Code Snippet: The Vulnerability

<%String PageId = request.getParameter("flag");%>
···
<%if (PageId!=null){%>
<SCRIPT language=JavaScript>opentree('<%=PageId%>','<%=topNodes%>');</SCRIPT>
<%}%>
···

In the above code snippet, the PageId parameter is directly embedded into a JavaScript function call without any sanitization. This allows an attacker to inject malicious JavaScript code by manipulating the flag parameter in the URL.

Proof of Concept (POC)

To demonstrate the vulnerability, a simple POC can be constructed by manipulating the flag parameter in the URL:

http(s)://target-ip/menu.jsp?flag=%3C/script%3E%3Cscript%3Ealert(1)%3C/script%3E

Impact and Mitigation

The Reflected XSS vulnerability in Yonyou UFIDA ERP-NC V5.0 can have severe consequences, including:

Session Hijacking: An attacker can manipulate the user's session, steal sensitive information, or even take control of the user's device.
Data Tampering: An attacker can inject malicious JavaScript code to tamper with user data, leading to data loss or corruption.
Denial of Service (DoS): An attacker can inject malicious JavaScript code to cause a DoS attack, leading to a denial of service for legitimate users.

To mitigate this vulnerability, the following steps can be taken:

Sanitize User Input: Ensure that user-supplied input is properly sanitized before being included in the HTML output.
Validate User Input: Validate user input to prevent malicious JavaScript code from being injected.
Use a Web Application Firewall (WAF): Implement a WAF to detect and prevent XSS attacks.
Regularly Update and Patch: Regularly update and patch the Yonyou UFIDA ERP-NC V5.0 application to ensure that all known vulnerabilities are addressed.

The Reflected XSS vulnerability in Yonyou UFIDA ERP-NC V5.0 is a serious security flaw that can have devastating consequences. By understanding the vulnerability, its impact, and the steps to mitigate it, organizations can take proactive measures to prevent attacks and protect their users. It is essential to regularly update and patch the application, sanitize user input, validate user input, and implement a WAF to ensure the security and integrity of the application.
Yonyou UFIDA ERP-NC V5.0: A Reflected XSS Vulnerability - Q&A

In our previous article, we discussed the Reflected Cross-Site Scripting (XSS) vulnerability in Yonyou UFIDA ERP-NC V5.0. This article provides a Q&A section to address common questions and concerns related to this vulnerability.

Q1: What is Reflected XSS?

A: Reflected XSS is a type of web application security vulnerability that occurs when an attacker injects malicious JavaScript code into a vulnerable web application. This code is then reflected back to the user's browser, where it is executed in the context of the victim's session.

Q2: How does the Reflected XSS vulnerability in Yonyou UFIDA ERP-NC V5.0 work?

A: The vulnerability exists in the menu.jsp page, where user-supplied input is not properly sanitized before being included in the HTML output. The flag parameter, which is passed via the URL, is directly included in the HTML output without proper sanitization. This allows an attacker to inject arbitrary JavaScript code, which is then executed in the context of the victim's browser.

Q3: What is the impact of the Reflected XSS vulnerability in Yonyou UFIDA ERP-NC V5.0?

A: The Reflected XSS vulnerability in Yonyou UFIDA ERP-NC V5.0 can have severe consequences, including:

Session Hijacking: An attacker can manipulate the user's session, steal sensitive information, or even take control of the user's device.
Data Tampering: An attacker can inject malicious JavaScript code to tamper with user data, leading to data loss or corruption.
Denial of Service (DoS): An attacker can inject malicious JavaScript code to cause a DoS attack, leading to a denial of service for legitimate users.

Q4: How can I prevent the Reflected XSS vulnerability in Yonyou UFIDA ERP-NC V5.0?

A: To prevent the Reflected XSS vulnerability in Yonyou UFIDA ERP-NC V5.0, the following steps can be taken:

Sanitize User Input: Ensure that user-supplied input is properly sanitized before being included in the HTML output.
Validate User Input: Validate user input to prevent malicious JavaScript code from being injected.
Use a Web Application Firewall (WAF): Implement a WAF to detect and prevent XSS attacks.
Regularly Update and Patch: Regularly update and patch the Yonyou UFIDA ERP-NC V5.0 application to ensure that all known vulnerabilities are addressed.

Q5: What is the Proof of Concept (POC) for the Reflected XSS vulnerability in Yonyou UFIDA ERP-NC V5.0?

A: The POC for the Reflected XSS vulnerability in Yonyou UFIDA ERP-NC V5.0 is:

http(s)://target-ip/menu.jsp?flag=%3C/script%3E%3Cscript%3Ealert(1)%3C/script%3E

Q6: How can I report the Reflected XSS vulnerability in Yonyou UFIDA ERP-NC V5.0?

A: If you have discovered the Reflected XSS vulnerability in Yonyou UFIDA ERP-NC V5.0, you can report it to the vendor or the relevant authorities. It is essential to provide detailed information about the vulnerability, including the POC and the steps to reproduce it.