CVE-2025-15420 is a SQL injection vulnerability identified in Yonyou KSOA version 9.0, affecting the /worksheet/agent_work_report.jsp endpoint. The vulnerability arises from improper sanitization of the 'ID' parameter, allowing an attacker to inject malicious SQL code remotely without requiring authentication or user interaction. This can lead to unauthorized data access, modification, or deletion within the backend database. The CVSS 4.0 score of 6.9 reflects a medium severity, considering the ease of remote exploitation and lack of authentication, but limited impact scope and absence of known active exploits. The vendor was notified but has not issued a patch or response, increasing the risk for organizations relying on this software. The vulnerability's exploitation could compromise sensitive business data, disrupt operations, or facilitate further attacks. Given the public disclosure of exploit details, attackers could develop weaponized payloads, emphasizing the need for immediate mitigation.

For European organizations, exploitation of this vulnerability could lead to unauthorized disclosure of sensitive corporate data, manipulation of business records, or disruption of workflow processes managed by Yonyou KSOA. This can result in financial losses, reputational damage, regulatory non-compliance (especially under GDPR), and operational downtime. Organizations in sectors such as manufacturing, finance, and supply chain management that use Yonyou KSOA for enterprise resource planning or workflow automation are particularly at risk. The lack of vendor response and patch availability increases the window of exposure. Additionally, attackers could leverage this vulnerability as a foothold for lateral movement within networks, escalating the overall threat landscape.

1. Implement strict input validation and parameterized queries or prepared statements in the affected application code to prevent SQL injection. 2. Deploy Web Application Firewalls (WAFs) configured to detect and block SQL injection attempts targeting the vulnerable endpoint. 3. Restrict network access to the Yonyou KSOA application to trusted IP addresses and internal networks only, minimizing exposure to the internet. 4. Monitor application logs and network traffic for unusual query patterns or repeated access to /worksheet/agent_work_report.jsp with suspicious parameters. 5. Conduct a thorough security audit of all web-facing components of Yonyou KSOA to identify and remediate similar injection flaws. 6. Engage with Yonyou or third-party security vendors for potential patches or workarounds. 7. Consider isolating the affected system in a segmented network zone to limit potential lateral movement if compromised.