CVE-2025-8226: ChanCMS Information Disclosure Vulnerability

CVE-2025-8226 Overview

CVE-2025-8226 is an information disclosure vulnerability identified in yanyutao0402 ChanCMS versions up to 3.1.2. This security flaw affects the /sysApp/find endpoint, where improper handling of the accessKey and secretKey parameters allows attackers to extract sensitive information remotely. The vulnerability has been publicly disclosed, and exploitation details are available, increasing the risk of active attacks against unpatched systems.

Critical Impact

Remote attackers can exploit this vulnerability to access sensitive authentication credentials (accessKey/secretKey), potentially leading to unauthorized system access and further compromise of the ChanCMS installation.

Affected Products

• ChanCMS versions up to and including 3.1.2
• Chancms Chancms (all versions prior to 3.1.3)

Discovery Timeline

• 2025-07-27 - CVE-2025-8226 published to NVD
• 2025-08-26 - Last updated in NVD database

Technical Details for CVE-2025-8226

Vulnerability Analysis

This vulnerability falls under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). The flaw exists within the /sysApp/find endpoint of ChanCMS, where insufficient access controls and improper parameter handling allow unauthenticated or low-privileged users to retrieve sensitive credential information.

The vulnerability enables remote attackers to manipulate the accessKey and secretKey parameters to extract authentication credentials that should remain protected. This type of information disclosure can serve as a stepping stone for more severe attacks, including unauthorized administrative access or lateral movement within the affected infrastructure.

Root Cause

The root cause of CVE-2025-8226 stems from inadequate input validation and missing access control checks on the /sysApp/find endpoint. The application fails to properly verify whether the requesting user has appropriate permissions to access the sensitive accessKey and secretKey values. Additionally, the endpoint does not implement sufficient sanitization of user-supplied input, allowing manipulation that results in unintended data exposure.

Attack Vector

The attack is network-based, requiring no physical access to the target system. An attacker can exploit this vulnerability remotely by sending crafted HTTP requests to the /sysApp/find endpoint. The attack requires low privileges and no user interaction, making it relatively straightforward to execute.

The exploitation process involves manipulating the accessKey or secretKey parameters in requests to the vulnerable endpoint. When the server processes these manipulated requests, it inadvertently discloses sensitive authentication information that can be leveraged for further attacks.

For technical details regarding the vulnerability mechanism, refer to the Gitee ChanCMS Issue Report which contains the original disclosure information.

Detection Methods for CVE-2025-8226

Indicators of Compromise

• Unusual HTTP requests targeting the /sysApp/find endpoint with manipulated accessKey or secretKey parameters
• Increased traffic patterns to the /sysApp/find endpoint from external IP addresses
• Log entries showing repeated attempts to access system configuration endpoints
• Evidence of credential harvesting activities following successful exploitation

Detection Strategies

• Monitor web server access logs for requests to /sysApp/find containing suspicious parameter values
• Implement Web Application Firewall (WAF) rules to detect and block exploitation attempts targeting ChanCMS endpoints
• Deploy intrusion detection signatures to identify information disclosure attack patterns
• Review application logs for anomalous access patterns to sensitive system functions

Monitoring Recommendations

• Enable detailed logging on the ChanCMS application to capture all requests to sensitive endpoints
• Configure alerting for unusual access patterns to the /sysApp/find endpoint
• Monitor for any unauthorized use of exposed credentials that may indicate successful exploitation
• Regularly audit access logs for signs of reconnaissance or exploitation attempts

How to Mitigate CVE-2025-8226

Immediate Actions Required

• Upgrade ChanCMS to version 3.1.3 or later, which addresses this vulnerability
• Restrict network access to the /sysApp/find endpoint pending the upgrade
• Rotate any potentially exposed accessKey and secretKey credentials
• Review access logs to determine if the vulnerability has been exploited

Patch Information

The vendor has addressed this vulnerability in ChanCMS version 3.1.3. Upgrading to this version is the recommended remediation approach. For additional information, refer to the VulDB entry #317814 and the Gitee ChanCMS Issue Report.

Workarounds

• Implement IP-based access restrictions to limit who can reach the /sysApp/find endpoint
• Deploy a Web Application Firewall (WAF) with rules to filter malicious requests targeting the vulnerable parameters
• Temporarily disable the /sysApp/find endpoint if it is not critical to operations
• Apply network segmentation to isolate the ChanCMS installation from untrusted networks

# Example: Restrict access to vulnerable endpoint using nginx
location /sysApp/find {
    # Allow only trusted internal networks
    allow 10.0.0.0/8;
    allow 192.168.0.0/16;
    deny all;
}