CVE-2026-13716 in Crafty Controller
Summary
by MITRE • 08/11/2026
Path traversal in server import and admin file upload in Crafty Controller. Allows a remote, authenticated attacker to upload files to arbitrary paths permitted to the Crafty Controller application and perform remote code execution.
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Analysis
by VulDB Data Team • 08/12/2026
This vulnerability represents a critical path traversal flaw within the Crafty Controller application that enables authenticated attackers to bypass file upload restrictions and execute arbitrary code on the target system. The vulnerability stems from insufficient input validation and improper path handling during server import and admin file upload operations, creating an exploitable condition where attacker-controlled files can be written to arbitrary locations within the application's directory structure.
The technical implementation of this flaw involves the manipulation of file path parameters during upload processes, allowing attackers to traverse directory boundaries and write malicious payloads to locations that should normally be restricted. This type of vulnerability typically maps to CWE-22 Path Traversal and CWE-73 Path Traversal in File Name, where user-supplied input is directly incorporated into file system operations without proper sanitization or validation. The vulnerability exists in the application's file handling logic, specifically within the server import functionality and administrative file upload mechanisms that fail to properly validate or sanitize file paths before processing.
From an operational perspective, this vulnerability creates a severe attack surface that allows remote exploitation by authenticated users who can leverage the path traversal capability to upload malicious files to critical system locations. Once successful, the attacker gains the ability to execute arbitrary code with the privileges of the Crafty Controller application, potentially leading to full system compromise, data exfiltration, or persistent backdoor access. The attack requires only authentication credentials, making it particularly dangerous as it can be exploited by insiders or compromised accounts.
The impact of this vulnerability extends beyond simple file upload capabilities and represents a serious privilege escalation vector that can be leveraged for further reconnaissance and lateral movement within affected networks. According to ATT&CK framework category T1078 Valid Accounts and T1566 Phishing, an authenticated attacker with knowledge of this vulnerability can use it as a foothold for more extensive attacks. The vulnerability also aligns with ATT&CK technique T1203 Exploitation for Client Execution when the uploaded malicious files are executed through legitimate application processes.
Effective mitigation strategies must address both the immediate code-level issues and implement comprehensive security controls to prevent similar vulnerabilities from occurring in the future. Organizations should implement strict input validation and sanitization for all file path parameters, enforce proper access controls and directory permissions, and deploy automated file upload validation mechanisms that check for malicious content and forbidden path sequences. Additionally, implementing principle of least privilege for application accounts and regular security testing including penetration testing can help identify and remediate such vulnerabilities before they can be exploited by malicious actors. The solution should also include logging and monitoring capabilities to detect suspicious file upload activities and immediate alerting when path traversal attempts are detected.