Overview
A path traversal vulnerability, identified as CVE-2025-66206, has been discovered in Frappe Framework versions prior to 15.86.0 and 14.99.2. This vulnerability allows attackers with knowledge of the server’s file paths to potentially retrieve sensitive files. This issue primarily affects deployments directly using Werkzeug/Gunicorn without a reverse proxy. Sites hosted on Frappe Cloud or behind reverse proxies like NGINX are generally unaffected.
Technical Details
The vulnerability stems from insufficient input validation and sanitization when handling file path requests. By manipulating the request parameters, an attacker can traverse the directory structure and access files outside of the intended scope. Specifically, the application fails to properly restrict user-supplied paths, leading to the potential disclosure of sensitive configuration files, source code, or other critical data. The vulnerable code is related to the handling of static assets or file retrieval functionalities within the Frappe Framework.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) has assigned a score of 6.8 (MEDIUM) to CVE-2025-66206. This score reflects the following factors:
- Attack Vector: Network (AV:N)
- Attack Complexity: Low (AC:L)
- Privileges Required: None (PR:N)
- User Interaction: None (UI:N)
- Scope: Unchanged (S:U)
- Confidentiality: High (C:H)
- Integrity: None (I:N)
- Availability: None (A:N)
The high confidentiality impact indicates that the primary risk is the unauthorized disclosure of sensitive information. The low attack complexity and lack of required privileges make this vulnerability relatively easy to exploit.
Possible Impact
Successful exploitation of this vulnerability could lead to:
- Data Leakage: Exposure of sensitive configuration files containing database credentials, API keys, or other confidential information.
- Source Code Disclosure: Access to the application’s source code, potentially revealing other vulnerabilities or business logic.
- System Compromise: In severe cases, the leaked information could be used to further compromise the system or gain unauthorized access.
- Reputational Damage: A successful attack could damage the reputation of the organization using the vulnerable Frappe Framework.
Mitigation and Patch Steps
To mitigate the risk of CVE-2025-66206, it is highly recommended to take the following steps:
- Upgrade Frappe Framework: Upgrade to version 15.86.0 or 14.99.2 or later. These versions contain the necessary fixes to address the path traversal vulnerability.
- Implement a Reverse Proxy (Recommended): If you are directly using Werkzeug/Gunicorn, deploying a reverse proxy such as NGINX or Apache can provide an additional layer of security by filtering malicious requests and preventing direct access to the application server.
- Verify Configuration: Ensure that your Frappe Framework instance is properly configured to restrict access to sensitive files and directories.
- Regular Security Audits: Conduct regular security audits and penetration testing to identify and address potential vulnerabilities in your applications and infrastructure.
References
- GitHub Security Advisory: https://github.com/frappe/frappe/security/advisories/GHSA-v4wg-gqfr-rpjm
- Frappe Framework Official Website: https://frappe.io/
