CVE-2025-15421
Published: 02 January 2026
Summary
CVE-2025-15421 is a medium-severity Injection (CWE-74) vulnerability in Yonyou Ksoa. Its CVSS base score is 6.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 30.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SC-7 (Boundary Protection) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2025-15421 is a SQL injection vulnerability (CWE-74, CWE-89) in Yonyou KSOA 9.0, affecting unknown code within the HTTP GET Parameter Handler component, specifically the file /worksheet/agent_worksadd.jsp. The flaw is triggered by manipulation of the ID argument, enabling remote SQL injection attacks. It carries a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L) and was published on 2026-01-02.
The vulnerability can be exploited remotely by unauthenticated attackers with network access and low complexity, requiring no user interaction. Successful exploitation grants limited impacts on confidentiality, integrity, and availability, potentially allowing unauthorized data access, modification, or disruption via injected SQL payloads.
Advisories from VulDB and a public GitHub repository detail the issue but report no vendor response despite early notification; no patches or official mitigations are available. The exploit is public and may be actively used.
Security practitioners should isolate or decommission exposed Yonyou KSOA 9.0 instances, apply web application firewalls to block SQL injection patterns on the affected endpoint, and monitor for exploitation attempts targeting the ID parameter.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-0720
Vulnerability details
A vulnerability was detected in Yonyou KSOA 9.0. This vulnerability affects unknown code of the file /worksheet/agent_worksadd.jsp of the component HTTP GET Parameter Handler. The manipulation of the argument ID results in sql injection. The attack can be launched remotely.…
more
The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Remote unauthenticated SQL injection in public-facing web app component directly enables T1190 exploitation.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation of the ID HTTP GET parameter to reject SQL metacharacters before they reach the agent_worksadd.jsp handler.
Boundary protection devices (e.g., WAF rules) can inspect and block SQL injection payloads targeting the exposed /worksheet/agent_worksadd.jsp endpoint.
Continuous monitoring of web-server and database logs can identify anomalous SQL syntax or error patterns originating from the vulnerable ID parameter.