CVE-2025-60946: Census CSWeb Path Traversal Vulnerability

CVE-2025-60946 Overview

CVE-2025-60946 is a path traversal vulnerability affecting Census CSWeb version 8.0.1. The application fails to properly validate file path input, allowing a remote, authenticated attacker to access unintended file directories on the server. This vulnerability has been classified under CWE-22 (Improper Limitation of a Pathname to a Restricted Directory).

Critical Impact

Authenticated attackers can traverse directory boundaries and access sensitive files outside intended directories, potentially exposing configuration files, credentials, or other sensitive data stored on the system.

Affected Products

• CSPro Users CSWeb 8.0.1
• Census CSWeb installations prior to version 8.1.0 alpha

Discovery Timeline

• 2026-03-23 - CVE-2025-60946 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2025-60946

Vulnerability Analysis

This path traversal vulnerability exists in Census CSWeb 8.0.1, a web application used for census data collection and management. The application accepts arbitrary file path input without proper sanitization, enabling authenticated users to escape the intended directory structure and access files elsewhere on the system.

The vulnerability requires valid authentication credentials, meaning an attacker must first obtain legitimate access to the application. However, once authenticated, the attacker can manipulate file path parameters to traverse directories using sequences such as ../ or absolute paths, bypassing intended access restrictions.

The impact is significant as it allows unauthorized file access that could lead to exposure of sensitive configuration files, database credentials, user data, or other confidential information stored on the server.

Root Cause

The root cause is improper input validation of file path parameters (CWE-22). The application fails to sanitize or validate user-supplied file paths before processing them, allowing directory traversal sequences to escape the application's intended directory scope. The fix implemented in version 8.1.0 alpha addresses this by properly restricting file path input to intended directories.

Attack Vector

The attack is network-based and requires low privilege authentication. An authenticated attacker can craft malicious requests containing path traversal sequences to access files outside the authorized directories. The attack does not require user interaction and has low complexity, making it relatively straightforward to exploit once valid credentials are obtained.

The vulnerability allows an attacker to manipulate file path parameters in application requests. By injecting directory traversal sequences (such as ../) or absolute paths, the attacker can navigate outside the intended directory structure. For example, requests that normally access files within the application's data directory can be modified to read files from system directories, potentially exposing sensitive configuration files, credentials, or other protected data. For additional technical details, see the GitHub Exploit Repository and the CISA Vulnerability Report.

Detection Methods for CVE-2025-60946

Indicators of Compromise

• Web server access logs containing path traversal sequences (../, ..%2f, %2e%2e/) in request parameters
• Unusual file access patterns from the CSWeb application to system directories outside its normal scope
• Authentication followed by requests attempting to access sensitive system files like /etc/passwd or configuration files
• Error logs showing file access denials or unexpected file path operations

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block path traversal patterns in request parameters
• Monitor application logs for requests containing directory traversal sequences or attempts to access files outside expected directories
• Deploy file integrity monitoring on sensitive system directories to detect unauthorized access attempts
• Analyze authentication logs for unusual patterns followed by suspicious file access requests

Monitoring Recommendations

• Enable verbose logging for the CSWeb application to capture all file access operations
• Set up alerts for any file access attempts outside the application's designated data directories
• Monitor network traffic for HTTP requests containing encoded path traversal sequences
• Implement real-time log analysis to detect exploitation attempts as they occur

How to Mitigate CVE-2025-60946

Immediate Actions Required

• Upgrade to Census CSWeb version 8.1.0 alpha or later immediately, as this version contains the fix for the path traversal vulnerability
• Implement network segmentation to limit access to systems running vulnerable CSWeb versions
• Review authentication logs to identify any potentially compromised accounts that could be used for exploitation
• Deploy web application firewall rules to block path traversal patterns as a temporary protective measure

Patch Information

The vulnerability has been fixed in Census CSWeb version 8.1.0 alpha. The fix can be found in the GitHub commit eba0b59a243390a1a4f9524cce6dbc0314bf0d91. Organizations should upgrade to this version or later to remediate the vulnerability. Additional details are available in the official CVE record.

Workarounds

• Implement strict input validation on file path parameters at the web server or reverse proxy level to reject requests containing traversal sequences
• Restrict file system permissions for the CSWeb application service account to only necessary directories
• Deploy a web application firewall (WAF) configured to detect and block path traversal attack patterns
• If feasible, restrict network access to the CSWeb application to trusted IP ranges only until patching is complete

# Example: Block path traversal patterns in nginx (temporary mitigation)
# Add to server block configuration
location / {
    if ($request_uri ~* "\.\.") {
        return 403;
    }
    # Additional CSWeb proxy/application configuration
}