CVE-2025-7115: Rowboat Authentication Bypass Vulnerability

CVE-2025-7115 Overview

A critical authentication bypass vulnerability has been identified in rowboatlabs rowboat, an open-source project. The vulnerability affects the PUT function within the file upload API handler located at apps/rowboat/app/api/uploads/[fileId]/route.ts. Due to improper authentication validation in the Session Handler component, an attacker can manipulate the params argument to bypass authentication controls entirely, potentially gaining unauthorized access to file upload functionality.

Critical Impact

Remote attackers can bypass authentication to access and modify uploaded files without valid credentials, potentially leading to unauthorized data access, file manipulation, or further system compromise.

Affected Products

• rowboatlabs rowboat (commit 8096eaf63b5a0732edd8f812bee05b78e214ee97 and prior)
• rowboat Session Handler component
• rowboat File Upload API (apps/rowboat/app/api/uploads/[fileId]/route.ts)

Discovery Timeline

• 2025-07-07 - CVE-2025-7115 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-7115

Vulnerability Analysis

This vulnerability stems from missing authentication checks in the file upload API route handler. The PUT function in the Session Handler component fails to properly validate that incoming requests originate from authenticated users before processing file operations. The vulnerable endpoint accepts the fileId parameter from the route path and processes upload modifications without verifying session validity or user authorization.

The attack surface is network-accessible, requiring no user interaction or special privileges. An attacker can craft malicious requests targeting the /api/uploads/[fileId] endpoint and manipulate the params argument to bypass authentication mechanisms entirely. This allows unauthorized access to file upload functionality, which could be leveraged to overwrite existing files, inject malicious content, or exfiltrate sensitive data stored in uploaded files.

The vulnerability is classified under CWE-287 (Improper Authentication), indicating a fundamental flaw in how the application validates user identity before granting access to protected resources.

Root Cause

The root cause is the absence of authentication middleware or validation logic in the PUT request handler for the file upload API route. The Session Handler component does not verify user session tokens or credentials before processing file modification requests, allowing any remote attacker to directly invoke the endpoint.

Attack Vector

The attack can be launched remotely over the network. An attacker crafts HTTP PUT requests directly to the vulnerable endpoint /api/uploads/[fileId], manipulating the route parameters to target specific files. Since no authentication is required, the attacker can:

1. Enumerate file IDs to discover existing uploads
2. Modify or overwrite legitimate user files
3. Upload malicious content that may be served to other users
4. Access sensitive information stored in uploaded files

The vulnerability in the route.ts file allows unauthenticated access to the file upload functionality. The PUT handler processes the params argument without first validating that the request originates from an authorized user session. For technical details regarding the specific code patterns involved, see the GitHub Issue #166.

Detection Methods for CVE-2025-7115

Indicators of Compromise

• Unusual PUT requests to /api/uploads/[fileId] endpoints from unauthenticated sources
• File modification timestamps that don't correlate with authenticated user activity
• Suspicious file content changes or unexpected file overwrites in the upload directory
• Access logs showing repeated file enumeration patterns against the uploads API

Detection Strategies

• Monitor HTTP access logs for PUT requests to the uploads API that lack valid session cookies or authentication headers
• Implement Web Application Firewall (WAF) rules to flag requests to sensitive upload endpoints without proper authentication tokens
• Deploy anomaly detection to identify bulk file enumeration or modification attempts
• Review application logs for authentication bypass attempts or missing session validation errors

Monitoring Recommendations

• Enable detailed logging for all API endpoints, particularly file upload routes
• Set up alerts for high volumes of unauthenticated requests to protected resources
• Implement file integrity monitoring on upload directories to detect unauthorized modifications
• Configure real-time alerting for requests matching known attack patterns against this vulnerability

How to Mitigate CVE-2025-7115

Immediate Actions Required

• Restrict access to the rowboat application to trusted networks only until a patch is available
• Implement authentication middleware at the network or reverse proxy level to protect the vulnerable endpoint
• Review and audit all files in the upload directory for potential unauthorized modifications
• Monitor for any suspicious activity targeting the /api/uploads/ endpoints

Patch Information

The rowboatlabs rowboat project uses continuous delivery with rolling releases. A fix is expected to be released in the near future. Monitor the GitHub repository for updates and pull the latest commits once the vulnerability is addressed. No specific version numbers are available due to the rolling release model.

Workarounds

• Add authentication middleware to protect the /api/uploads/[fileId] route at the application or reverse proxy level
• Implement IP-based access controls to limit who can reach the vulnerable endpoint
• Disable or restrict the file upload functionality until the official fix is released
• Deploy a Web Application Firewall (WAF) with rules to enforce authentication on PUT requests to upload endpoints

# Example: Nginx configuration to require authentication for uploads endpoint
location /api/uploads/ {
    auth_basic "Restricted Access";
    auth_basic_user_file /etc/nginx/.htpasswd;
    proxy_pass http://localhost:3000;
}