CVE-2025-67077: Agora-project File Upload Vulnerability

CVE-2025-67077 Overview

CVE-2025-67077 is a file upload vulnerability affecting Omnispace Agora Project versions before 25.10. This security flaw allows authenticated users, and under certain conditions guest users, to upload arbitrary files through the UploadTmpFile action. File upload vulnerabilities of this nature (CWE-434: Unrestricted Upload of File with Dangerous Type) can lead to severe consequences including remote code execution when attackers upload malicious scripts or executables to the server.

Critical Impact

Attackers can exploit this vulnerability to upload malicious files that may lead to remote code execution, complete system compromise, or data exfiltration. The fact that guest users may also exploit this flaw under certain conditions significantly expands the attack surface.

Affected Products

• Agora Project versions prior to 25.10
• Agora Project installations with default or misconfigured guest access permissions
• Web servers hosting vulnerable Agora Project deployments

Discovery Timeline

• 2026-01-15 - CVE-2025-67077 published to NVD
• 2026-01-21 - Last updated in NVD database

Technical Details for CVE-2025-67077

Vulnerability Analysis

This vulnerability falls under CWE-434 (Unrestricted Upload of File with Dangerous Type), which occurs when applications fail to properly validate or restrict the types of files that can be uploaded. In the case of Agora Project, the UploadTmpFile action does not adequately validate uploaded file content, extensions, or MIME types before storing them on the server.

The network-accessible nature of this vulnerability means attackers can exploit it remotely without physical access to the target system. The low attack complexity indicates that exploitation requires minimal technical skill once the vulnerability is identified. While authentication is typically required, certain configurations may allow guest users to trigger the vulnerable functionality, making this particularly dangerous for publicly accessible installations.

Root Cause

The root cause of CVE-2025-67077 lies in insufficient input validation within the UploadTmpFile action handler. The application fails to implement proper server-side validation mechanisms to verify that uploaded files conform to expected and safe file types. This allows attackers to bypass any client-side restrictions and upload files with dangerous extensions (such as .php, .jsp, .aspx) that can be executed by the web server.

Attack Vector

The attack vector is network-based, allowing remote exploitation. An attacker can craft malicious HTTP requests to the UploadTmpFile endpoint, submitting files with dangerous content or extensions. When guest access is misconfigured, unauthenticated attackers can also exploit this vulnerability.

The typical exploitation flow involves:

1. Identifying a vulnerable Agora Project installation
2. Crafting a malicious file (e.g., web shell) disguised or uploaded directly
3. Submitting the file through the UploadTmpFile action
4. Accessing the uploaded file to trigger code execution

For detailed technical analysis, refer to the Helx Blog Advisory.

Detection Methods for CVE-2025-67077

Indicators of Compromise

• Unusual file uploads in temporary directories, particularly files with executable extensions (.php, .jsp, .aspx, .exe)
• Web access logs showing POST requests to the UploadTmpFile endpoint from suspicious IP addresses
• Presence of web shells or unfamiliar script files in upload directories
• Unexpected outbound network connections from the web server

Detection Strategies

• Implement file integrity monitoring on upload directories to detect unauthorized file additions
• Configure web application firewalls (WAF) to inspect and block suspicious file upload requests
• Monitor HTTP POST requests to the UploadTmpFile action for anomalous patterns or file types
• Deploy endpoint detection solutions to identify malicious file execution attempts

Monitoring Recommendations

• Enable verbose logging for the Agora Project application and review logs for upload activity
• Set up alerts for file creation events in upload directories with executable extensions
• Monitor for unusual process spawning from the web server process
• Implement network traffic analysis to detect command-and-control communications

How to Mitigate CVE-2025-67077

Immediate Actions Required

• Upgrade Agora Project to version 25.10 or later immediately
• Review and restrict guest access permissions to prevent unauthorized file uploads
• Audit existing upload directories for suspicious or malicious files
• Implement network segmentation to limit potential lateral movement if exploitation occurs

Patch Information

The vulnerability is addressed in Agora Project version 25.10 and later releases. Organizations should prioritize upgrading to the latest version available. For more information about the Agora Project and available updates, visit the Agora Project Homepage.

Workarounds

• Disable the UploadTmpFile functionality if not required for business operations
• Implement strict file type whitelisting at the web server or WAF level to block dangerous extensions
• Restrict access to the upload endpoint to authenticated and authorized users only
• Configure the web server to prevent execution of scripts in upload directories

# Example Apache configuration to prevent script execution in upload directories
<Directory "/var/www/agora/uploads">
    Options -ExecCGI -Indexes
    AllowOverride None
    RemoveHandler .php .phtml .php3 .php4 .php5 .phps
    AddType text/plain .php .phtml .php3 .php4 .php5 .phps
    php_flag engine off
</Directory>