CVE-2025-15435 is a medium-severity SQL injection vulnerability affecting Yonyou KSOA version 9.0. The vulnerability resides in the /worksheet/work_update.jsp endpoint, where the Report parameter is improperly sanitized, allowing an attacker to inject malicious SQL code. This injection flaw can be exploited remotely without requiring authentication or user interaction, making it highly accessible to attackers. The vulnerability impacts the confidentiality, integrity, and availability of the underlying database, though the scope of impact is limited (VC:L/VI:L/VA:L). The vendor was notified early but has not provided a patch or response, increasing the risk exposure. While no exploits have been observed in the wild, the public disclosure and availability of exploit details raise the likelihood of future attacks. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) reflects the ease of exploitation and the lack of prerequisites. The flaw could allow attackers to extract sensitive data, modify records, or disrupt application functionality, potentially affecting business operations relying on KSOA. Given Yonyou's significant market presence in China and parts of Asia, organizations in these regions are particularly vulnerable. The absence of vendor mitigation necessitates immediate defensive measures to reduce attack surface and monitor for suspicious activity.

The SQL injection vulnerability in Yonyou KSOA 9.0 can lead to unauthorized access to sensitive data, data manipulation, and potential service disruption. Confidentiality is compromised as attackers may extract database contents. Integrity is affected since attackers can alter or delete data. Availability may be impacted if the injection leads to database errors or application crashes. The remote, unauthenticated nature of the exploit increases risk, enabling attackers to target systems over the internet without user interaction. Organizations relying on KSOA for critical business processes could face operational disruptions, data breaches, and compliance violations. The lack of vendor response and patch availability prolongs exposure, increasing the window for exploitation. Although no active exploits are reported, the public disclosure and exploit code availability raise the threat level. This vulnerability could be leveraged in targeted attacks against enterprises using Yonyou KSOA, especially in sectors with sensitive data such as finance, manufacturing, and government.

1. Implement strict input validation and sanitization on all user-supplied parameters, especially the Report parameter in /worksheet/work_update.jsp, using allowlists and parameterized queries where possible. 2. Deploy a Web Application Firewall (WAF) with rules to detect and block SQL injection attempts targeting the vulnerable endpoint. 3. Restrict network access to the KSOA application server by limiting exposure to trusted IP addresses and internal networks. 4. Monitor application and database logs for unusual query patterns or errors indicative of SQL injection attempts. 5. Conduct regular security assessments and penetration testing focused on injection flaws. 6. Isolate the database server from direct internet access and enforce least privilege principles for database accounts used by KSOA. 7. Engage with Yonyou support channels to request official patches or guidance and track updates. 8. Prepare incident response plans to quickly address potential exploitation. 9. Consider temporary disabling or restricting access to the vulnerable functionality if feasible until a patch is available.