CVE-2025-15435 is a SQL injection vulnerability identified in Yonyou KSOA version 9.0, affecting an unspecified functionality within the /worksheet/work_update.jsp endpoint. The vulnerability arises from improper sanitization of the 'Report' parameter, allowing an attacker to inject malicious SQL queries remotely without requiring authentication or user interaction. The CVSS 4.0 score is 6.9 (medium), reflecting the network attack vector, low complexity, and no privileges or user interaction needed. The impact includes partial compromise of confidentiality, integrity, and availability, as attackers could extract sensitive data, modify database contents, or disrupt service. The vendor was notified but has not issued a patch or response, and although an exploit is publicly available, no active exploitation has been reported. This vulnerability poses a significant risk to organizations relying on Yonyou KSOA 9.0, especially in environments where the affected endpoint is exposed to untrusted networks. The lack of vendor response and patch increases the urgency for organizations to implement compensating controls.

For European organizations, exploitation of this vulnerability could lead to unauthorized access to sensitive business data, data manipulation, and potential service disruption. Given Yonyou KSOA's role in enterprise resource planning and workflow management, successful attacks may compromise operational integrity and confidentiality of corporate data. This could result in financial losses, regulatory non-compliance (e.g., GDPR violations due to data breaches), and reputational damage. The medium severity rating indicates moderate but tangible risks, especially if attackers leverage the vulnerability to pivot within networks or exfiltrate data. Organizations with exposed or poorly segmented KSOA deployments are particularly vulnerable. The absence of vendor patches means that reliance on internal security measures is critical to prevent exploitation.

1. Implement strict input validation and sanitization on the 'Report' parameter at the application level to block malicious SQL payloads. 2. Deploy Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting the /worksheet/work_update.jsp endpoint. 3. Restrict network access to the KSOA application, limiting exposure to trusted internal networks and VPNs only. 4. Conduct thorough code reviews and penetration testing focused on SQL injection vectors within the application. 5. Monitor logs for unusual database queries or failed injection attempts to detect early exploitation signs. 6. Segment the network to isolate critical systems and reduce lateral movement opportunities. 7. Engage with Yonyou support channels regularly for updates or patches and consider alternative solutions if vendor support remains absent. 8. Prepare incident response plans specifically addressing potential SQL injection exploitation scenarios.