CVE-2026-11412: SQL Injection in Jinher OA C6 GetFormSn.aspx

Technical summary

CVE-2026-11412 is a SQL injection flaw (CWE-89) in Jinher OA C6's /C6/JHSoft.Web.ModuleCount/GetFormSn.aspx endpoint. The vulnerability stems from insufficient input validation on the queryID parameter, allowing authenticated users to inject SQL commands directly into database queries. This violates secure coding practices for parameterized queries and represents a classic improper neutralization of special elements (CWE-74). The CVSS 3.1 vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L) reflects a network-accessible attack requiring valid credentials, with low complexity, no user interaction, and impact limited to confidentiality, integrity, and availability within the affected system.

Business impact

This vulnerability enables authenticated attackers to breach database confidentiality and integrity. In a typical Jinher OA deployment, this could lead to unauthorized access to sensitive organizational documents, customer records, or internal communications stored in the application database. Attackers could also modify or delete records, potentially disrupting business processes or causing compliance violations. The public availability of exploit code elevates the practical risk significantly.

Affected systems

Jinher OA C6 deployments are affected. The vulnerability requires valid user credentials to exploit, limiting the attack surface to internal users or compromised accounts. Organizations using Jinher OA C6 should inventory affected instances and assess user access controls.

Exploitability

The vulnerability is exploitable with low effort. An authenticated attacker needs network access and valid login credentials; no complex techniques or user interaction are required. The public availability of working exploit code means skilled attackers and potentially less-sophisticated threat actors can weaponize this vulnerability. While authentication is required, compromised accounts, insider threats, or lateral movement from other vulnerabilities could provide the initial access needed.

Remediation

Contact Jinher immediately to request a security patch or workaround. Given the vendor's non-responsiveness documented in the CVE record, consider whether an alternative product or manual compensating controls (such as strict database access restrictions, query monitoring, and application firewall rules) are necessary. Input validation and parameterized query enforcement should be standard practice in any remediation offered by the vendor.

Patch guidance

Verify the latest vendor advisory from Jinher for patch availability and version numbers. Apply patches immediately to all affected C6 instances. Until a patch is available, implement network segmentation to restrict access to the vulnerable endpoint, enforce strong authentication policies, and monitor database query logs for suspicious SQL patterns. Consider deploying a Web Application Firewall (WAF) configured to block SQL injection attempts on the /C6/JHSoft.Web.ModuleCount/GetFormSn.aspx endpoint.

Detection guidance

Monitor application logs for SQL error messages or unusual database queries originating from the GetFormSn.aspx endpoint. Analyze HTTP request logs for suspicious queryID parameter values containing SQL metacharacters (quotes, dashes, semicolons, or SQL keywords). Enable database audit logging to capture any queries executed by the OA application user that deviate from normal patterns. Hunt for POST/GET requests to the vulnerable path with encoded or obfuscated payloads.

Why prioritize this

This vulnerability merits high-priority remediation due to the combination of public exploit availability, low attack complexity, and direct database access impact. Although authentication is required, the prevalence of compromised credentials and insider threats means the practical risk is substantial. Immediate patching or compensating controls are essential.

Risk score, explained

The CVSS 3.1 score of 6.3 (MEDIUM) reflects network accessibility with low attack complexity and authenticated access requirements. However, the CVSS baseline does not account for the public availability of exploit code and vendor non-responsiveness, both of which elevate practical risk. Organizations should treat this as a higher priority than the base CVSS suggests.

Frequently asked questions