CVE-2025-15421: Yonyou KSOA 9.0 SQL Injection Vulnerability

CVE-2025-15421 Overview

A SQL injection vulnerability has been identified in Yonyou KSOA (Space-Time Enterprise Information Integration Platform) version 9.0. This vulnerability exists in the HTTP GET Parameter Handler component, specifically affecting the file /worksheet/agent_worksadd.jsp. Attackers can exploit this flaw by manipulating the ID parameter to inject malicious SQL commands, potentially compromising the integrity and confidentiality of the backend database.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability without authentication to extract, modify, or delete sensitive data from the underlying database, potentially leading to complete database compromise.

Affected Products

• Yonyou KSOA 9.0
• Yonyou Space-Time Enterprise Information Integration Platform (KSOA)

Discovery Timeline

• 2026-01-02 - CVE-2025-15421 published to NVD
• 2026-01-05 - Last updated in NVD database

Technical Details for CVE-2025-15421

Vulnerability Analysis

This SQL injection vulnerability (classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) affects the agent_worksadd.jsp endpoint within the Yonyou KSOA platform. The vulnerability arises from improper handling of user-supplied input in the ID parameter, which is passed directly to database queries without adequate sanitization or parameterization.

When a malicious actor crafts a specially designed HTTP GET request containing SQL metacharacters in the ID parameter, the application fails to properly neutralize these characters before incorporating them into SQL statements. This allows the attacker to break out of the intended query structure and execute arbitrary SQL commands against the backend database.

The network-accessible nature of this vulnerability significantly increases the risk exposure, as any unauthenticated remote attacker with network access to the vulnerable endpoint can attempt exploitation. The public availability of exploit information further elevates the threat level for organizations running affected versions.

Root Cause

The root cause of this vulnerability is insufficient input validation and the absence of parameterized queries in the agent_worksadd.jsp file. The ID parameter from HTTP GET requests is directly concatenated into SQL queries rather than being properly escaped or bound as a parameter. This classic SQL injection pattern allows attackers to inject malicious SQL syntax that alters the intended query logic.

Attack Vector

The attack is executed remotely over the network by sending crafted HTTP GET requests to the vulnerable /worksheet/agent_worksadd.jsp endpoint. Attackers manipulate the ID parameter by appending SQL injection payloads such as single quotes, UNION statements, or boolean-based conditions. No authentication or user interaction is required to exploit this vulnerability.

The exploitation mechanism involves injecting SQL syntax through the ID parameter that breaks out of the intended query context. Attackers can leverage techniques such as error-based injection, UNION-based extraction, or time-based blind injection to enumerate database contents, extract sensitive information, or potentially modify data. For detailed technical information about the exploitation techniques, see the GitHub SQL Injection Exploit documentation.

Detection Methods for CVE-2025-15421

Indicators of Compromise

• HTTP GET requests to /worksheet/agent_worksadd.jsp containing SQL metacharacters (single quotes, double dashes, UNION keywords) in the ID parameter
• Database error messages appearing in web server logs indicating SQL syntax errors
• Unusual database query patterns or execution times from the application server
• Evidence of data exfiltration or unauthorized database access in audit logs

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in requests to /worksheet/agent_worksadd.jsp
• Implement intrusion detection system (IDS) signatures to identify SQL injection attack payloads targeting the ID parameter
• Enable detailed logging for the KSOA application and monitor for anomalous request patterns
• Configure database audit logging to detect unusual query patterns or unauthorized data access

Monitoring Recommendations

• Monitor web server access logs for requests containing encoded SQL injection payloads (URL-encoded quotes, hex-encoded characters)
• Set up alerts for database errors originating from the KSOA application that may indicate exploitation attempts
• Track and baseline normal database query patterns to identify anomalous behavior indicative of successful SQL injection
• Review application logs regularly for evidence of exploitation or reconnaissance activity

How to Mitigate CVE-2025-15421

Immediate Actions Required

• Restrict network access to the /worksheet/agent_worksadd.jsp endpoint using firewall rules or access control lists
• Deploy Web Application Firewall (WAF) rules to block SQL injection patterns targeting the vulnerable parameter
• Consider temporarily disabling the vulnerable functionality if it is not business-critical until a patch is available
• Implement network segmentation to limit database access from compromised web application servers

Patch Information

The vendor (Yonyou) was contacted early about this disclosure but did not respond. As of the last update on 2026-01-05, no official patch has been released. Organizations should monitor the vendor's official security advisories for patch availability. Additional vulnerability details can be found at VulDB ID #339343 and VulDB CTI ID #339343.

Workarounds

• Implement input validation at the application layer to reject requests containing SQL metacharacters in the ID parameter
• Deploy a reverse proxy or WAF with SQL injection detection capabilities in front of the KSOA application
• Apply the principle of least privilege to database accounts used by the KSOA application to limit the impact of successful exploitation
• If source code access is available, modify the agent_worksadd.jsp file to use parameterized queries or prepared statements

# Example WAF rule configuration to block SQL injection attempts
# ModSecurity rule example for Apache/Nginx
SecRule ARGS:ID "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    msg:'SQL Injection attempt detected in ID parameter',\
    log,\
    chain"
SecRule REQUEST_URI "@contains /worksheet/agent_worksadd.jsp"