CVE-2025-9931: Jinher OA XSS Vulnerability

CVE-2025-9931 Overview

CVE-2025-9931 is a reflected cross-site scripting (XSS) vulnerability in Jinher OA 1.0. The flaw exists in the /jc6/platform/sys/login!changePassWord.action endpoint, which belongs to the POST request handler. Attackers can manipulate the Account parameter to inject arbitrary script content that executes in the victim's browser. The vulnerability requires no authentication and can be triggered remotely. Public exploit details are available, increasing the likelihood of opportunistic attempts against exposed instances. The issue is tracked under CWE-79: Improper Neutralization of Input During Web Page Generation.

Critical Impact
Successful exploitation lets attackers execute arbitrary JavaScript in a victim's browser session, enabling credential theft, session manipulation, and phishing against Jinher OA users.

Affected Products

Jinher OA 1.0
Component: POST Request Handler at /jc6/platform/sys/login!changePassWord.action
Parameter: Account

Discovery Timeline

2025-09-04 - CVE-2025-9931 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-9931

Vulnerability Analysis

The vulnerability resides in the password change action of the Jinher OA login module. The application processes the Account argument submitted through a POST request to /jc6/platform/sys/login!changePassWord.action without properly neutralizing HTML and JavaScript metacharacters. When the parameter value is reflected back into the response, browsers interpret injected markup as executable content.

Because the endpoint is reachable pre-authentication and located on the login flow, attackers can craft URLs or forms that deliver malicious payloads to unsuspecting users. User interaction is required to trigger the payload, typically by clicking a crafted link or submitting a prepared form. The public availability of exploit details lowers the barrier for reuse in phishing campaigns targeting Jinher OA deployments.

Root Cause

The root cause is missing output encoding and input sanitization on the Account parameter. The application echoes user-supplied data into an HTML response context without applying context-aware escaping. This defect maps to [CWE-79] and is a canonical reflected XSS pattern in Java Struts-style action handlers.

Attack Vector

Exploitation follows a standard reflected XSS chain. An attacker crafts a POST request or auto-submitting HTML form that targets the vulnerable action and embeds JavaScript in the Account field. The victim is lured to the attacker-controlled page, which submits the request against a Jinher OA instance the victim can reach. The injected script executes within the origin of the Jinher OA application, giving the attacker access to cookies, session tokens, and DOM content for that origin.

The vulnerability mechanism is documented in the public GitHub CVE Issue Discussion and the VulDB entry #322333. No verified exploitation code is reproduced here.

Detection Methods for CVE-2025-9931

Indicators of Compromise

POST requests to /jc6/platform/sys/login!changePassWord.action containing HTML tags, <script>, javascript:, or event-handler attributes such as onerror= or onload= in the Account parameter.
HTTP referer headers pointing to unfamiliar external domains preceding requests to the Jinher OA login action.
Server responses that reflect unescaped angle brackets or script fragments from the request body.

Detection Strategies

Deploy a web application firewall (WAF) rule that inspects POST bodies to the affected action and blocks requests containing script tags or JavaScript URI schemes in the Account field.
Enable request/response logging on the Jinher OA web tier and alert on payloads matching common XSS signatures such as <script, onerror=, and document.cookie.
Correlate outbound browser telemetry with unusual DOM script execution originating from the Jinher OA origin.

Monitoring Recommendations

Forward web server access logs to a centralized log platform and build queries for anomalous Account parameter contents.
Monitor authentication and password-change flows for spikes in failed or malformed submissions.
Alert on user reports of unexpected redirects, popups, or credential prompts on the Jinher OA login page.

How to Mitigate CVE-2025-9931

Immediate Actions Required

Restrict network access to the Jinher OA /jc6/platform/sys/login!changePassWord.action endpoint to trusted internal networks or VPN users until a vendor fix is applied.
Deploy WAF signatures that filter script metacharacters and JavaScript URI schemes in POST parameters targeting the login module.
Instruct users to avoid clicking untrusted links referencing the Jinher OA host and to report suspicious login prompts.

Patch Information

No vendor advisory or patch URL is listed in the enriched CVE data at the time of writing. Administrators should monitor Jinher's official channels and the referenced VulDB entry for updated remediation guidance. Until a fix is issued, compensating controls listed below should be enforced.

Workarounds

Apply a reverse-proxy rule that HTML-encodes or rejects Account values containing <, >, ", ', or & characters before they reach the application server.
Set a strict Content Security Policy (CSP) header on Jinher OA responses to block inline script execution and untrusted script sources.
Enable the HttpOnly and Secure flags on session cookies to reduce the impact of a successful XSS payload.
Enforce short session lifetimes and require re-authentication for password changes.

bash

# Example NGINX reverse-proxy filter blocking script payloads in the Account parameter
location /jc6/platform/sys/login!changePassWord.action {
    if ($request_method = POST) {
        set $block 0;
        if ($request_body ~* "Account=[^&]*(<script|javascript:|onerror=|onload=)") {
            set $block 1;
        }
        if ($block = 1) {
            return 403;
        }
    }
    proxy_pass http://jinher_oa_backend;
    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'";
    add_header X-XSS-Protection "1; mode=block";
}