CVE-2026-1121 in KSOA
Summary
by MITRE • 01/18/2026
A vulnerability was found in Yonyou KSOA 9.0. This affects an unknown function of the file /worksheet/del_workplan.jsp of the component HTTP GET Parameter Handler. The manipulation of the argument ID results in sql injection. The attack can be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 02/09/2026
This vulnerability resides within the Yonyou KSOA 9.0 application platform where a critical sql injection flaw exists in the HTTP GET parameter handler component. The specific file affected is /worksheet/del_workplan.jsp which processes incoming HTTP GET requests containing an ID parameter. The flaw occurs when the application fails to properly sanitize or validate the ID argument before incorporating it into database queries, creating an avenue for malicious input manipulation. This represents a classic sql injection vulnerability that allows attackers to execute arbitrary sql commands against the underlying database system. The vulnerability's remote exploitability means that threat actors can trigger the malicious code execution without requiring physical access to the system, making it particularly dangerous in networked environments. The public availability of exploitation tools significantly increases the risk level as it removes the barrier to entry for potential attackers who may not possess advanced technical skills.
The technical implementation of this vulnerability follows established patterns where user-supplied input flows directly into sql query construction without proper input validation or parameterization. When an attacker submits a malicious ID parameter containing sql payload characters such as single quotes, semicolons, or sql keywords, the application processes these inputs without adequate sanitization, allowing the malicious sql commands to be executed within the database context. This flaw directly maps to CWE-89 which categorizes sql injection vulnerabilities as weaknesses in software that allows attackers to manipulate sql queries through improper input handling. The vulnerability's classification aligns with ATT&CK technique T1190 which describes the use of sql injection attacks to gain unauthorized access to database systems and extract sensitive information.
The operational impact of this vulnerability extends beyond simple data theft to encompass complete database compromise and potential system escalation. Attackers could leverage this vulnerability to extract confidential business data, modify critical records, or even establish persistence mechanisms within the database environment. The lack of vendor response to early disclosure attempts creates a significant risk gap where organizations using Yonyou KSOA 9.0 remain unprotected against known threats. The remote nature of the exploit means that organizations cannot rely on network segmentation or firewall rules to prevent unauthorized access, as the attack vector operates through standard web protocols. This vulnerability particularly affects enterprise environments where the KSOA platform likely manages critical business processes and sensitive operational data, making the potential impact substantial for affected organizations.
Organizations should immediately implement mitigations including input validation and parameterized queries to prevent sql injection exploitation. The most effective immediate solution involves patching the application to ensure that all user inputs are properly sanitized before database interaction occurs. Network-level protections such as web application firewalls can provide additional defense-in-depth measures, though they should not be relied upon as the primary defense mechanism. Security teams should conduct comprehensive vulnerability assessments to identify any other components within the KSOA platform that may suffer from similar input validation issues. The absence of vendor response necessitates that organizations develop their own remediation strategies while continuing to monitor for any additional related vulnerabilities. Regular security monitoring and log analysis should be enhanced to detect potential exploitation attempts, and access controls should be reviewed to minimize the potential impact if exploitation occurs. The public availability of exploitation tools makes immediate action essential as the window for successful attack remains open while organizations await official vendor patches or workarounds.