Overview
The Common Vulnerabilities and Exposures (CVE) list has recently been updated with a high-severity security issue, CVE-2025-11221. This vulnerability, classified as a Pathname Traversal and Unrestricted File Upload vulnerability, affects GTONE ChangeFlow software. It allows malicious actors to exploit an improperly constrained file upload mechanism and access restricted directories. The potential impact of this vulnerability is significant as it could lead to a system compromise or data leakage, making it a key concern for organizations using GTONE ChangeFlow.
Vulnerability Summary
CVE ID: CVE-2025-11221
Severity: High (CVSS 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
A new way to communicate
Ameeba Chat is built on encrypted identity, not personal profiles.
Message, call, share files, and coordinate with identities kept separate.
- • Encrypted identity
- • Ameeba Chat authenticates access
- • Aliases and categories
- • End-to-end encrypted chat, calls, and files
- • Secure notes for sensitive information
Private communication, rethought.
Product | Affected Versions
GTONE ChangeFlow | All versions through v9.0.1.1
How the Exploit Works
The vulnerability stems from ChangeFlow’s insufficient security mechanisms in handling file uploads and directory access. An attacker can exploit this by uploading a file with a malicious payload and manipulating the file path. This allows them to traverse the file system and access restricted directories. Given the lack of proper Access Control Lists (ACLs), the attacker can execute the uploaded file leading to potential system compromise or leakage of sensitive data.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited. This example shows a HTTP POST request where an attacker uploads a malicious file and modifies the file path to access restricted directories.
POST /uploadfile HTTP/1.1
Host: target.example.com
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW
----WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="file"; filename="../../etc/passwd"
Content-Type: text/plain
{ "malicious_payload": "..." }
----WebKitFormBoundary7MA4YWxkTrZu0gW--In the above example, the attacker is attempting to overwrite the “/etc/passwd” file, a critical system file in Unix-based systems, with their malicious payload.
The mitigation strategy for this vulnerability involves applying the patch provided by the vendor or using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary measure. It’s highly recommended to apply the patch as soon as it’s available to avoid potential system compromise or data leakage.