CVE-2026-77137 in Forms Export Extension
Summary
by MITRE • 08/25/2026
The extension fails to properly sanitize user input before using it in a database query. As a result, a low-privileged backend user can inject arbitrary SQL through a URL parameter within the "Forms Export" backend module. Exploitation requires a low-privileged backend user and read access to the "Forms Export" Backend module.
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Analysis
by VulDB Data Team • 08/25/2026
The vulnerability described constitutes an Injection flaw specifically categorized under CWE-89, commonly known as SQL Injection. This security weakness arises from a failure in input validation and sanitization processes within the application logic of the Forms Export backend module. When user-supplied data is received via URL parameters, it is not adequately filtered or escaped before being incorporated into database queries executed by the backend system. This lack of proper separation between code and data allows an attacker to manipulate the structure of SQL commands intended for legitimate use, thereby subverting the security model of the underlying database management system.
From a technical perspective, the exploitation vector relies on the application's handling of query parameters passed through HTTP requests. Because the extension does not properly sanitize these inputs, special characters or specific syntactic constructs can be embedded within the URL parameter to alter the intended SQL statement. For instance, an attacker might append logical operators, comment sequences, or additional queries that are interpreted by the database engine rather than treated as literal data values. This behavior indicates a fundamental flaw in how the application prepares and executes statements against its persistent storage layer, likely due to direct string concatenation instead of parameterized queries or prepared statements which would inherently mitigate such risks.
The operational impact of this vulnerability is significant given that exploitation requires only low-privileged backend user credentials and read access to the Forms Export module. While the requirement for authentication limits the attack surface compared to remote unauthenticated exploits, it still poses a serious threat within internal environments where privilege escalation or lateral movement may be desired. An attacker with these limited permissions can potentially extract sensitive data stored in the database, modify existing records, or even execute administrative commands depending on the privileges granted to the backend user account running the application. This could lead to unauthorized disclosure of confidential information such as customer details, internal configurations, or proprietary business logic contained within the forms and their associated data structures.
In terms of threat modeling and industry frameworks, this vulnerability aligns with MITRE ATT&CK techniques related to Data from Information Repositories (T1005) if used for exfiltration, or potentially T1190 Exploit Public-Facing Application if the backend interface is accessible externally. The scenario highlights a common risk in content management systems and enterprise applications where internal tools are often assumed to be secure due to authentication requirements, yet lack robust input validation mechanisms. This oversight allows authenticated users with minimal privileges to perform actions beyond their intended scope, violating the principle of least privilege and potentially leading to broader system compromise if combined with other vulnerabilities or misconfigurations.
To mitigate this vulnerability, developers must implement strict input validation on all user-supplied data before it is processed by the backend logic. The most effective technical remediation involves replacing direct string concatenation in SQL queries with parameterized queries or prepared statements provided by the database driver and application framework. This ensures that user input is treated strictly as data rather than executable code, neutralizing injection attempts regardless of their content. Additionally, implementing a Web Application Firewall can provide an additional layer of defense by detecting and blocking malicious patterns associated with SQL injection attacks at the network perimeter. Regular security audits and static analysis tools should also be employed to identify similar flaws across other modules within the application ecosystem.