CVE-2020-37117: jizhiCMS Path Traversal Vulnerability

CVE-2020-37117 Overview

jizhiCMS 1.6.7 contains a file download vulnerability in the admin plugins update endpoint that allows authenticated administrators to download arbitrary files. Attackers can exploit the vulnerability by sending crafted POST requests with malicious filepath and download_url parameters to trigger unauthorized file downloads. This vulnerability is classified as CWE-434 (Unrestricted Upload of File with Dangerous Type).

Critical Impact

Authenticated administrators can leverage this vulnerability to download arbitrary files from the server, potentially exposing sensitive configuration files, database credentials, and other critical system data.

Affected Products

• jizhiCMS version 1.6.7

Discovery Timeline

• February 5, 2026 - CVE-2020-37117 published to NVD
• February 5, 2026 - Last updated in NVD database

Technical Details for CVE-2020-37117

Vulnerability Analysis

This arbitrary file download vulnerability exists in the admin plugins update endpoint of jizhiCMS 1.6.7. The flaw stems from insufficient validation of user-supplied input in the filepath and download_url parameters. When an authenticated administrator sends a specially crafted POST request to the vulnerable endpoint, the application fails to properly sanitize or restrict the file paths that can be accessed.

The vulnerability allows attackers with administrative credentials to bypass intended access controls and download files from arbitrary locations on the server's filesystem. This could include sensitive configuration files containing database credentials, application secrets, or other confidential data that should not be accessible through the web interface.

Root Cause

The root cause of this vulnerability is inadequate input validation on the filepath and download_url parameters in the plugin update functionality. The application does not implement proper path traversal protections or whitelist validation to ensure that only legitimate plugin files can be downloaded. This allows attackers to manipulate these parameters to reference files outside the intended plugin directory structure.

Attack Vector

The attack is network-based and requires the attacker to have authenticated administrative access to the jizhiCMS installation. Once authenticated, the attacker can craft malicious POST requests to the admin plugins update endpoint, manipulating the filepath and download_url parameters to specify arbitrary file locations on the target server.

The exploitation process involves:

1. Authenticating to the jizhiCMS admin panel with valid administrator credentials
2. Crafting a POST request to the plugins update endpoint
3. Manipulating the filepath parameter with path traversal sequences or absolute paths
4. Triggering the download of sensitive files from outside the intended directory

For detailed technical analysis and exploitation methodology, see the Exploit-DB #48361 entry and the VulnCheck Advisory for JizhiCMS.

Detection Methods for CVE-2020-37117

Indicators of Compromise

• Unusual POST requests to admin plugin update endpoints containing path traversal sequences such as ../ or absolute file paths
• Access log entries showing requests for sensitive files like /etc/passwd, configuration files, or database credential files through the CMS
• Anomalous download activity from administrative sessions targeting non-plugin file locations
• Unexpected file access patterns in web server logs originating from the admin panel

Detection Strategies

• Monitor HTTP POST requests to the admin plugins update endpoint for suspicious filepath or download_url parameter values
• Implement web application firewall (WAF) rules to detect and block path traversal patterns in request parameters
• Enable detailed logging on the jizhiCMS installation to capture all administrative actions
• Deploy file integrity monitoring to detect unauthorized access to sensitive system files

Monitoring Recommendations

• Configure alerting for unusual file download patterns from the administrative interface
• Review authentication logs for compromised administrator accounts that may be used to exploit this vulnerability
• Implement network-level monitoring to detect data exfiltration attempts following successful exploitation
• Regularly audit administrative user accounts and access privileges

How to Mitigate CVE-2020-37117

Immediate Actions Required

• Restrict administrative access to trusted IP addresses only using network-level controls
• Review and audit all administrator accounts for unauthorized access or suspicious activity
• Consider disabling or restricting access to the plugins update functionality until a patch is available
• Implement additional authentication factors for administrative access

Patch Information

Consult the JizhiCMS Homepage for the latest version information and security updates. Organizations should upgrade to a patched version of jizhiCMS as soon as one becomes available. Review the VulnCheck Advisory for JizhiCMS for the most current remediation guidance.

Workarounds

• Implement strict access controls limiting which IP addresses can access the administrative interface
• Use a web application firewall to filter requests containing path traversal sequences in the filepath and download_url parameters
• Consider running jizhiCMS in a containerized environment with limited filesystem access to reduce the impact of arbitrary file downloads
• Temporarily disable the plugins update feature if it is not critical to operations

# Example: Restrict admin access by IP in .htaccess
<Directory "/path/to/jizhicms/admin">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Directory>