CVE-2026-22895 in QuFTP Service
Summary
by MITRE • 03/20/2026
A cross-site scripting (XSS) vulnerability has been reported to affect QuFTP Service. If a remote attacker gains an administrator account, they can then exploit the vulnerability to bypass security mechanisms or read application data.
We have already fixed the vulnerability in the following versions: QuFTP Service 1.4.3 and later QuFTP Service 1.5.2 and later QuFTP Service 1.6.2 and later
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 03/26/2026
This cross-site scripting vulnerability in QuFTP Service represents a critical security flaw that enables remote attackers to execute malicious scripts within the context of administrator sessions. The vulnerability specifically affects versions prior to the patched releases, creating a persistent threat vector that could allow attackers to escalate privileges and gain unauthorized access to sensitive administrative functions. The flaw manifests when authenticated administrators interact with vulnerable application components, making it particularly dangerous in environments where administrative access is required for system management. This type of vulnerability directly violates security principles by allowing malicious code execution in the context of trusted user sessions, potentially leading to complete system compromise.
The technical implementation of this XSS vulnerability stems from inadequate input validation and output encoding mechanisms within the QuFTP Service application. When administrators process user-supplied data or interact with web interfaces, the application fails to properly sanitize or escape special characters that could be interpreted as executable script code. This allows attackers who have obtained administrative credentials to inject malicious payloads that persist within the application's response handling mechanisms. The vulnerability operates at the application layer and can be exploited through various vectors including form inputs, URL parameters, or even file upload functionalities that do not adequately filter user-provided content. According to CWE classification, this vulnerability maps to CWE-79 which specifically addresses Cross-Site Scripting flaws in web applications.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking, as it enables attackers to bypass critical security controls that protect administrative functions. Once an attacker gains administrative access, they can leverage this XSS vulnerability to manipulate the application's behavior, access restricted data, modify system configurations, or even establish persistent backdoors within the FTP service environment. The ability to read application data through this vector creates significant risk for organizations relying on QuFTP Service for file transfer operations, as sensitive information could be extracted without proper authorization. This vulnerability undermines the principle of least privilege and can lead to complete compromise of the underlying file transfer infrastructure, potentially affecting thousands of users and files within the system's scope.
Organizations using affected versions of QuFTP Service should immediately implement comprehensive mitigation strategies including immediate patch deployment to versions 1.4.3, 1.5.2, or 1.6.2 and later. System administrators should also implement additional security controls such as web application firewalls, input validation layers, and regular security audits to detect potential exploitation attempts. The vulnerability demonstrates the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies. According to ATT&CK framework, this vulnerability maps to T1059.007 for script injection techniques and T1566 for credential access through social engineering or privilege escalation methods. Organizations should also conduct thorough security assessments to identify any potential exploitation that may have occurred before patching, as the vulnerability could have been used to establish persistent access to the system's administrative functions.