CVE-2026-78837 in MachForm
Summary
by MITRE • 09/08/2026
A SQL injection vulnerability in the ap_form_{id} parameter in AppNitro MachForm v30 allows attackers to access sensitive database information via a crafted SQL statement.
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Analysis
by VulDB Data Team • 09/08/2026
The identified security flaw resides within the ApNitro MachForm application, specifically targeting the dynamic form identifier parameter denoted as ap_form_id. This vulnerability is classified as an Injection issue under the Common Weakness Enumeration standard, more precisely CWE-89 which covers Improper Neutralization of Special Elements used in an SQL Command. The root cause stems from insufficient input validation and sanitization mechanisms applied to user-supplied data before it is incorporated into backend database queries. When a malicious actor crafts a specific HTTP request containing specially constructed SQL syntax within the ap_form_id parameter, the application fails to distinguish between executable code and legitimate data input. This failure allows the injected payload to be interpreted by the underlying Structured Query Language engine as part of the original command structure rather than as mere string data.
The operational impact of this vulnerability is severe due to its potential for unauthorized access to sensitive database information. By exploiting this flaw, an attacker can manipulate the logic of SQL queries executed against the application's backend storage system. This capability enables a range of malicious activities including but not limited to extracting confidential user credentials, personal identifiable information stored within form submissions, and other proprietary data housed in the database schema. The severity is further compounded by the fact that MachForm applications often handle sensitive survey or registration data, making the confidentiality integrity and availability implications significant for organizations relying on this platform for critical business processes.
From a tactical perspective aligned with the MITRE ATT&CK framework, this vulnerability facilitates techniques associated with Data from Information Repositories under the Collection tactic. Attackers can leverage SQL injection to bypass authentication controls or escalate privileges if combined with other vulnerabilities, although in its current isolated description it primarily serves as an initial vector for data exfiltration. The exploitation typically involves crafting a payload that terminates the original query and appends new commands such as UNION SELECT statements to retrieve additional rows from unrelated tables within the database schema. This process requires careful enumeration of table structures which can often be achieved through error-based or blind injection techniques depending on how the application handles malformed input responses.
Mitigation strategies must focus on implementing robust defense-in-depth measures starting with strict input validation and parameterized queries at the code level. Developers should ensure that all dynamic inputs, particularly those influencing database query construction like form identifiers are treated strictly as data rather than executable commands by utilizing prepared statements or stored procedures provided by modern database drivers. Additionally deploying a Web Application Firewall can provide an immediate layer of protection by detecting and blocking known SQL injection patterns before they reach the application logic. Regular security audits including static code analysis and dynamic penetration testing should be conducted to identify similar weaknesses across other parameters within the MachForm ecosystem ensuring comprehensive remediation beyond just this specific instance.