CVE-2026-12195 in vesta
Summary
by MITRE • 07/04/2026
myVesta is affected by an authenticated remote code execution vulnerability. Low privileged users can insert arbitrary commands as a part of the v_ftp_user parameter when deleting FTP usernames. This could result in the execution of commands as the admin user or takevoer of the admin user in myVesta.
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Analysis
by VulDB Data Team • 07/04/2026
The authenticated remote code execution vulnerability in myVesta represents a critical security flaw that allows low privileged users to escalate their privileges and execute arbitrary commands with administrative rights. This vulnerability specifically affects the v_ftp_user parameter during FTP username deletion operations, creating an injection vector that can be exploited by malicious actors who have already gained access to a basic user account. The flaw stems from inadequate input validation and sanitization within the application's command execution mechanisms, where user-supplied parameters are directly incorporated into system commands without proper escaping or filtering.
The technical implementation of this vulnerability aligns with CWE-77 and CWE-94, which describe command injection flaws and code injection vulnerabilities respectively. These weaknesses enable attackers to manipulate the command execution flow by injecting malicious payloads through the v_ftp_user parameter. When a user attempts to delete an FTP username, the system processes the provided parameter without sufficient validation, allowing special characters and command separators to be interpreted as part of the executing command rather than literal input. This creates a pathway for arbitrary code execution that operates with the privileges of the administrative user who owns the myVesta application.
The operational impact of this vulnerability extends far beyond simple privilege escalation, as it provides attackers with complete control over the system hosting myVesta. Successful exploitation could result in unauthorized data access, modification of critical system files, installation of persistent backdoors, and potential lateral movement within the network. The vulnerability is particularly dangerous because it requires only low privileged user access to initiate the attack, making it accessible to anyone who can authenticate to the system. This aligns with ATT&CK technique T1068 which covers local privilege escalation through application vulnerabilities, and T1133 which addresses external remote services that can be leveraged for command execution.
Mitigation strategies should include immediate patching of the affected myVesta version and implementation of proper input validation and sanitization measures. All user-supplied parameters must undergo strict filtering to prevent command injection attacks, with special characters being properly escaped or removed before any system interaction occurs. Additionally, privilege separation should be enforced where administrative operations require explicit confirmation or elevated authentication beyond basic user credentials. System administrators should also implement monitoring for unusual command execution patterns and consider network segmentation to limit the potential impact of successful exploitation attempts. The vulnerability demonstrates the critical importance of applying defense-in-depth principles and maintaining up-to-date security patches across all application components to prevent attackers from leveraging seemingly minor flaws into complete system compromises.