CVE-2026-0587: Xinhu RockOA XSS Vulnerability

CVE-2026-0587 Overview

A Cross-Site Scripting (XSS) vulnerability has been discovered in Xinhu Rainrock RockOA versions up to 2.7.1. The vulnerability exists in an unknown function within the file rock_page_gong.php of the Cover Image Handler component. By manipulating the fengmian argument, an attacker can inject malicious scripts that execute in the context of a victim's browser session. The attack can be launched remotely, and exploit code has been publicly released.

Critical Impact

Attackers can execute arbitrary JavaScript in authenticated user sessions, potentially leading to session hijacking, credential theft, and unauthorized actions within the RockOA application.

Affected Products

• Xinhu Rainrock RockOA versions up to 2.7.1
• RockOA Cover Image Handler component (rock_page_gong.php)

Discovery Timeline

• 2026-01-05 - CVE CVE-2026-0587 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2026-0587

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The flaw resides in the Cover Image Handler functionality within rock_page_gong.php, where user-supplied input through the fengmian parameter is not properly sanitized before being rendered in the page output.

When a user submits specially crafted input through the fengmian argument, the application fails to encode or escape potentially dangerous characters. This allows an attacker to inject HTML or JavaScript code that will be executed in the browser context of any user who views the affected page.

The vulnerability requires low privileges to exploit and necessitates user interaction, as the victim must access the page containing the malicious payload. While this limits the attack surface somewhat, the public availability of exploit code increases the risk of exploitation in the wild.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding in the Cover Image Handler component. The fengmian parameter accepts user input that is directly incorporated into the page's HTML output without proper sanitization. The application fails to:

1. Validate that the input conforms to expected format for cover image data
2. Encode or escape special characters such as <, >, ", ', and & before rendering
3. Implement Content Security Policy (CSP) headers that would mitigate script injection attacks

Attack Vector

The attack is network-based, allowing remote exploitation. An attacker can craft a malicious URL or form submission containing JavaScript payload in the fengmian parameter. When a victim user with an active RockOA session accesses this malicious request, the injected script executes with the victim's privileges.

The vulnerability can be exploited through:

• Reflected XSS via crafted URLs sent to victims
• Stored XSS if the cover image data is persisted to the database

Since the exploit has been publicly disclosed, attackers can leverage available proof-of-concept code to target vulnerable RockOA installations. Technical details regarding the specific exploitation mechanism can be found in the VulDB advisory.

Detection Methods for CVE-2026-0587

Indicators of Compromise

• Unusual or encoded JavaScript patterns in URL parameters targeting rock_page_gong.php
• HTTP requests containing <script> tags or event handlers in the fengmian parameter
• Server logs showing requests to Cover Image Handler with suspicious payloads
• User reports of unexpected pop-ups or redirects when accessing RockOA pages

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect XSS payloads in the fengmian parameter
• Monitor HTTP access logs for requests to rock_page_gong.php containing encoded script content
• Implement browser-based XSS auditors and Content Security Policy headers for defense-in-depth
• Configure SentinelOne Singularity to detect and block web-based script injection attempts

Monitoring Recommendations

• Enable detailed logging for all requests to the RockOA Cover Image Handler component
• Set up alerts for patterns matching common XSS payloads in URL query strings
• Review web server access logs regularly for exploitation attempts
• Monitor for unauthorized session activity that may indicate successful XSS exploitation

How to Mitigate CVE-2026-0587

Immediate Actions Required

• Restrict access to rock_page_gong.php until a patch is available
• Implement input validation on the fengmian parameter to allow only expected cover image values
• Deploy Web Application Firewall rules to filter XSS payloads targeting the affected endpoint
• Enable Content Security Policy headers to prevent inline script execution

Patch Information

The vendor was contacted regarding this vulnerability but did not respond. As of the last NVD update on 2026-01-08, no official patch has been released by Xinhu Rainrock. Organizations should implement the workarounds below and monitor the VulDB advisory for updates on patch availability.

Workarounds

• Apply server-side input sanitization by encoding HTML special characters in the fengmian parameter
• Implement a strict Content Security Policy (CSP) header to prevent inline script execution
• Consider disabling the Cover Image Handler functionality if not business-critical
• Deploy a reverse proxy or WAF with XSS filtering capabilities in front of RockOA

# Apache mod_headers configuration for Content Security Policy
# Add to your RockOA virtual host configuration

<IfModule mod_headers.c>
    Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; frame-ancestors 'self';"
    Header set X-Content-Type-Options "nosniff"
    Header set X-XSS-Protection "1; mode=block"
</IfModule>