CVE-2025-15436: Yonyou KSOA SQL Injection Vulnerability

CVE-2025-15436 Overview

A SQL injection vulnerability has been discovered in Yonyou KSOA version 9.0. The vulnerability exists in the /worksheet/work_edit.jsp file, where improper handling of the Report parameter allows attackers to inject malicious SQL queries. This flaw enables remote attackers to manipulate database queries without authentication, potentially compromising data confidentiality, integrity, and availability.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract sensitive data, modify database contents, or potentially gain unauthorized access to the underlying system through database operations.

Affected Products

• Yonyou KSOA 9.0

Discovery Timeline

• 2026-01-02 - CVE-2025-15436 published to NVD
• 2026-01-07 - Last updated in NVD database

Technical Details for CVE-2025-15436

Vulnerability Analysis

This vulnerability is classified as CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), specifically manifesting as SQL injection. The affected endpoint /worksheet/work_edit.jsp fails to properly sanitize the Report parameter before incorporating it into SQL queries. This allows attackers to inject arbitrary SQL commands that are executed by the database engine with the privileges of the application.

The exploit has been publicly disclosed, and the vendor was contacted about this vulnerability but did not respond. This lack of vendor response increases the risk profile as no official patch timeline has been communicated.

Root Cause

The root cause of this vulnerability is insufficient input validation and lack of parameterized queries in the /worksheet/work_edit.jsp file. The Report argument is directly concatenated into SQL statements without proper sanitization or the use of prepared statements, allowing attackers to break out of the intended query context and execute arbitrary SQL commands.

Attack Vector

The attack can be launched remotely over the network without requiring authentication. An attacker can craft malicious HTTP requests to the vulnerable JSP endpoint, injecting SQL syntax through the Report parameter. The attack requires no user interaction and can be automated for exploitation at scale.

The vulnerability exists in the worksheet editing functionality where the Report parameter is processed. An attacker could manipulate this parameter to include SQL metacharacters and additional query statements, such as UNION-based injections for data extraction or stacked queries for data manipulation. This could lead to unauthorized access to sensitive database information, modification of existing records, or deletion of critical data.

Detection Methods for CVE-2025-15436

Indicators of Compromise

• Unusual HTTP requests to /worksheet/work_edit.jsp containing SQL syntax patterns in the Report parameter
• Database logs showing unexpected query patterns or error messages related to malformed SQL
• Web application logs containing special characters like single quotes, UNION keywords, or comment sequences in request parameters
• Evidence of data exfiltration or unauthorized database modifications

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect SQL injection patterns targeting the Report parameter
• Monitor HTTP access logs for requests to /worksheet/work_edit.jsp with suspicious payloads
• Implement database activity monitoring to detect anomalous query patterns
• Configure IDS/IPS signatures for SQL injection attack patterns

Monitoring Recommendations

• Enable verbose logging on the Yonyou KSOA application server for requests to /worksheet/ endpoints
• Set up alerting for database errors that may indicate injection attempts
• Monitor network traffic for unusual outbound data transfers that could indicate data exfiltration
• Review authentication and access logs for signs of unauthorized database access

How to Mitigate CVE-2025-15436

Immediate Actions Required

• Restrict network access to the vulnerable /worksheet/work_edit.jsp endpoint until a patch is available
• Implement WAF rules to filter SQL injection patterns in the Report parameter
• Apply network segmentation to limit database access from compromised web tier components
• Consider disabling the worksheet editing functionality if it is not business-critical

Patch Information

No official patch is currently available from the vendor. According to the vulnerability disclosure, the vendor was contacted but did not respond. Organizations should monitor VulDB and the GitHub CVE Issue Discussion for updates on this vulnerability. Consider reaching out to Yonyou directly for remediation guidance.

Workarounds

• Deploy input validation at the application gateway level to sanitize the Report parameter before it reaches the vulnerable endpoint
• Implement a reverse proxy with SQL injection filtering capabilities in front of the KSOA application
• Apply principle of least privilege to database accounts used by the application to minimize impact of successful exploitation
• Use network access controls to limit which systems can reach the vulnerable endpoint

# Example: Restrict access to vulnerable endpoint via Apache configuration
<Location "/worksheet/work_edit.jsp">
    Order Deny,Allow
    Deny from all
    Allow from 10.0.0.0/8
    # Only allow trusted internal networks
</Location>