CVE-2026-71808 in Ordering
Summary
by MITRE • 09/09/2026
A SQL Injection vulnerability in Siam Ordering (siam-server) 1.0.0 allows remote authenticated attackers to execute arbitrary SQL commands via the ${} string concatenation in AdminMapper.java and multiple other Mapper files (including MerchantWithdrawRecordMapper.java and MemberWithdrawRecordMapper.java).
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability identified involves a critical SQL Injection flaw within Siam Ordering version 1.0.0, specifically affecting the server component known as siam-server. This security defect permits remote authenticated attackers to execute arbitrary Structured Query Language commands against the underlying database infrastructure. The root cause of this exploitation lies in improper input validation and sanitization practices employed during the construction of dynamic SQL queries. Specifically, the application utilizes string concatenation via the ${} syntax within MyBatis mapper files, including AdminMapper.java, MerchantWithdrawRecordMapper.java, and MemberWithdrawRecordMapper.java. Unlike parameterized queries that use placeholders such as #{}, which treat input strictly as data values, the ${} construct performs direct literal substitution of variable content into the SQL statement before execution. This behavior effectively bypasses standard query parsing protections, allowing an attacker to inject malicious SQL fragments directly into the command stream if they can control any part of the concatenated string.
From a technical perspective, this flaw represents a classic instance of injection via dynamic code construction. When user-supplied input is embedded directly into a database query without adequate escaping or type checking, it alters the intended logic of the SQL statement. For example, an attacker might supply a value that includes closing quotes followed by additional SQL commands such as UNION SELECT statements to extract sensitive data, or DROP TABLE commands to destroy critical records. Because this vulnerability exists in multiple mapper files handling administrative and financial operations like merchant withdrawals and member transactions, the potential for significant data exfiltration is high. The attacker must be authenticated, meaning they need valid credentials to access these endpoints, but once inside, the scope of damage can extend beyond simple information disclosure to include complete compromise of database integrity and availability.
The operational impact of this vulnerability is severe due to its direct interaction with core business logic modules. AdminMapper.java likely handles administrative functions that may involve modifying system configurations or user permissions, while MerchantWithdrawRecordMapper.java and MemberWithdrawRecordMapper.java deal with financial records involving monetary transactions. Successful exploitation could lead to unauthorized access to sensitive customer personally identifiable information, alteration of transaction histories for fraud purposes, or deletion of critical business data. Furthermore, depending on the database configuration and privileges granted to the application account, an attacker might potentially escalate their attack vector to execute operating system commands through stored procedures or other database features, leading to full server compromise. This aligns with Common Weakness Enumeration CWE-89, which categorizes improper neutralization of special elements used in SQL commands, a flaw that remains one of the most prevalent and dangerous web application vulnerabilities globally.
In terms of threat modeling and attack classification, this vulnerability maps directly to MITRE ATT&CK technique T1059, specifically sub-technique 004 which covers Command Scripting via SQL Injection. The attacker leverages their authenticated session to inject payloads that are interpreted by the database engine rather than treated as literal data strings. This allows for a wide range of post-exploitation activities including credential harvesting through error-based or blind injection techniques, and potential lateral movement if the database server is linked to other internal systems. Organizations relying on this software face significant regulatory compliance risks under frameworks such as PCI DSS due to the handling of financial transaction data within these specific mapper files, making remediation a priority for maintaining security posture and legal adherence.
Mitigation strategies must focus immediately on refactoring the affected Java codebase to eliminate unsafe string concatenation in SQL query construction. Developers should replace all instances of ${} with #{} syntax in MyBatis mapper configurations where user input is involved, ensuring that parameters are passed as bound variables rather than literal text substitutions. This approach forces the database driver to properly escape and quote inputs, neutralizing injection attempts regardless of their content. Additionally, implementing strict input validation using allowlists for expected data formats can provide a secondary layer of defense. For existing deployments where immediate code changes are not feasible, deploying a Web Application Firewall with robust SQL Injection detection rules may help block malicious payloads at the network perimeter, although this is considered a compensating control rather than a definitive fix. Regular security audits and static application security testing should be integrated into the development lifecycle to prevent similar vulnerabilities from being introduced in future updates of Siam Ordering or related components.