CVE-2026-86171 in DefaultFuction
Summary
by MITRE • 09/06/2026
A security vulnerability has been detected in DefaultFuction CRM 1.0.0. This affects an unknown function of the file /modules/orders/delete.php. Such manipulation of the argument ID leads to sql injection. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 09/08/2026
The vulnerability identified in DefaultFuction CRM version 1.0.0 represents a critical security flaw located within the application's order management module, specifically affecting the file /modules/orders/delete.php. This component is responsible for processing requests to remove existing orders from the system database. The core issue stems from improper input validation and sanitization mechanisms applied to the ID argument passed by the user during deletion operations. When a request is made to delete an order, the application directly incorporates the provided identifier into SQL query construction without employing parameterized queries or adequate escaping procedures. This architectural oversight allows malicious actors to inject arbitrary SQL commands that are executed within the context of the database server, fundamentally compromising the integrity and confidentiality of the stored data.
From a technical perspective, this flaw is classified as an Injection vulnerability, specifically aligning with CWE-89: Improper Neutralization of Special Elements used in an SQL Command (SQL Injection). The absence of strict type checking or whitelist validation for the ID parameter enables attackers to manipulate the structure of the underlying database queries. By appending malicious payloads such as UNION SELECT statements or boolean-based blind injection techniques, an attacker can bypass authentication controls, extract sensitive information including user credentials and personal data, modify existing records, or even execute administrative commands on the database server depending on its configuration privileges. The vulnerability is remotely exploitable, meaning that no prior authentication or local access to the application environment is required for a successful attack, significantly increasing the risk surface for organizations deploying this software instance over networked environments.
The operational impact of this SQL injection vulnerability extends beyond simple data exfiltration. Successful exploitation can lead to complete compromise of the backend database infrastructure. Attackers may use the injected commands to dump entire tables containing customer information, financial records, and internal communications associated with the CRM system. Furthermore, depending on the specific Database Management System in use, such as MySQL or PostgreSQL, advanced techniques could potentially allow for operating system command execution if certain security configurations like xp_cmdshell are enabled or file write privileges exist within the database context. This level of access facilitates persistent backdoors and lateral movement within the network infrastructure, aligning with ATT&CK technique T1059: Command and Scripting Interpreter when used to execute further malicious scripts post-exploitation. The public disclosure of exploit code exacerbates this risk by lowering the barrier to entry for less sophisticated threat actors who can leverage existing tools rather than developing custom exploits from scratch.
Mitigation strategies must address both immediate remediation and long-term defensive posture improvements. The primary corrective action involves refactoring the affected PHP script to utilize prepared statements with parameterized queries, ensuring that user-supplied input is treated strictly as data rather than executable code. Additionally, implementing strict input validation rules that enforce expected data types for the ID field can provide an additional layer of defense against malformed requests. Deploying a Web Application Firewall configured with specific signatures for SQL injection patterns may help detect and block malicious traffic in real-time while patches are applied. Organizations should also conduct a comprehensive review of other modules within DefaultFuction CRM to identify similar vulnerabilities, as input handling flaws often exist across multiple endpoints when code reuse or copy-paste practices were employed during development. Regular security assessments and penetration testing focused on injection vectors are recommended to ensure ongoing resilience against evolving attack methodologies.