CVE-2025-2709: Yonyou Ufida ERP-NC XSS Vulnerability

CVE-2025-2709 Overview

CVE-2025-2709 is a reflected cross-site scripting (XSS) vulnerability [CWE-79] affecting Yonyou UFIDA ERP-NC 5.0. The flaw resides in the /login.jsp endpoint, where the key and redirect parameters are reflected into the response without proper sanitization. Remote attackers can craft malicious URLs that execute arbitrary JavaScript in a victim's browser session when the link is visited. The exploit details have been publicly disclosed, and the vendor did not respond to disclosure attempts. No official patch is currently referenced in public vulnerability databases.

Critical Impact
Attackers can hijack authenticated ERP sessions, steal credentials, and perform actions on behalf of enterprise users interacting with the login page.

Affected Products

Yonyou UFIDA ERP-NC 5.0
Vulnerable component: /login.jsp
Vulnerable parameters: key, redirect

Discovery Timeline

2025-03-24 - CVE-2025-2709 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-2709

Vulnerability Analysis

The vulnerability exists in the /login.jsp component of Yonyou UFIDA ERP-NC 5.0. User-controlled input passed through the key and redirect HTTP parameters is reflected into the rendered HTML response without adequate output encoding or input validation. This behavior enables reflected cross-site scripting, allowing attacker-controlled JavaScript to execute in the context of the target application origin.

Successful exploitation requires user interaction, typically clicking a crafted link. Because the affected endpoint is the login page, attackers can target authenticated administrators and business users. The impact is limited to integrity within the browser session, with no direct effect on server-side confidentiality or availability.

Root Cause

The root cause is improper neutralization of input during web page generation [CWE-79]. The application concatenates the key and redirect query string values directly into the response HTML without HTML entity encoding, JavaScript context escaping, or allowlist-based validation of expected values.

Attack Vector

The attack is network-based and requires user interaction. An attacker constructs a URL pointing to the target ERP host with a payload embedded in the key or redirect parameter, then delivers it through phishing email, chat, or a malicious website. When the victim opens the link, the injected script executes in the browser under the ERP application's origin. The attacker can then read Document Object Model (DOM) contents, exfiltrate session cookies not marked HttpOnly, deliver fake login prompts, or pivot to internal application functions through cross-site request forgery.

A typical malicious request pattern targets the reflected sink with a URL such as https://<erp-host>/login.jsp?redirect=<script-payload>, where the payload closes the surrounding attribute or tag context and executes attacker-supplied JavaScript. Refer to the GitHub CVE Issue Discussion and VulDB #300730 for reported exploitation details.

Detection Methods for CVE-2025-2709

Indicators of Compromise

HTTP GET requests to /login.jsp containing key or redirect parameters with characters such as <, >, script, onerror, onload, or URL-encoded equivalents (%3Cscript%3E).
Referrer headers pointing to external phishing domains preceding requests to the ERP login page.
Outbound browser connections to unfamiliar domains immediately after users interact with the login page.

Detection Strategies

Deploy a web application firewall (WAF) rule matching XSS payload patterns on the key and redirect parameters of /login.jsp.
Enable server-side access logging that captures full query strings and inspect logs for reflected XSS signatures.
Correlate email gateway telemetry with web proxy logs to identify phishing campaigns delivering crafted UFIDA ERP-NC URLs.

Monitoring Recommendations

Alert on repeated requests to /login.jsp with encoded script tags or JavaScript event handlers in query parameters.
Monitor authentication logs for suspicious session activity following user visits to the login page from external referrers.
Track user-agent anomalies and low-and-slow probing against the UFIDA ERP-NC front end.

How to Mitigate CVE-2025-2709

Immediate Actions Required

Restrict access to the UFIDA ERP-NC application to trusted networks or VPN clients until a vendor fix is available.
Deploy a WAF policy that blocks script tags, event handlers, and encoded XSS payloads on the key and redirect parameters of /login.jsp.
Educate users about phishing links referencing the ERP login page and enforce reporting of suspicious URLs.

Patch Information

At the time of publication, Yonyou has not released a security advisory or patch for CVE-2025-2709. The vendor was contacted about the disclosure but did not respond according to VulDB CTI Advisory #300730. Organizations should track vendor communications for a future update and apply it promptly when released.

Workarounds

Implement a reverse-proxy filter that rejects requests to /login.jsp containing angle brackets, javascript: URIs, or common XSS keywords in the key and redirect parameters.
Set HttpOnly and Secure flags on session cookies to reduce the impact of script-based cookie theft.
Enforce a strict Content Security Policy (CSP) header on ERP responses that disallows inline scripts and restricts script sources to trusted origins.
Validate the redirect parameter against an allowlist of internal URLs to prevent both XSS and open redirect abuse.

bash

# Example NGINX reverse-proxy rule to block XSS payloads on /login.jsp
location /login.jsp {
    if ($args ~* "(<|%3C)script|javascript:|onerror=|onload=") {
        return 403;
    }
    proxy_pass http://ufida-erp-backend;
}