CVE-2025-1388: Orca HCM Arbitrary File Upload RCE Flaw

CVE-2025-1388 Overview

CVE-2025-1388 is an arbitrary file upload vulnerability in Orca HCM from LEARNING DIGITAL. The flaw allows authenticated remote attackers holding only regular user privileges to upload files of their choosing to the application. Attackers can stage web shells through the upload functionality and execute them on the underlying server. Successful exploitation grants code execution in the context of the web application, enabling full compromise of confidentiality, integrity, and availability. The issue is tracked under CWE-434 (Unrestricted Upload of File with Dangerous Type) and was disclosed through Taiwan's TWCERT coordination process.

Critical Impact

Authenticated low-privilege users can upload and execute web shells, leading to remote code execution and full server compromise of Orca HCM deployments.

Affected Products

• LEARNING DIGITAL Orca HCM (human capital management platform)
• All versions prior to the vendor-supplied fix listed in the TWCERT advisory
• Internet-exposed Orca HCM portals are at the highest risk

Discovery Timeline

• 2025-02-17 - CVE-2025-1388 published to the National Vulnerability Database
• 2025-11-17 - Last updated in NVD database

Technical Details for CVE-2025-1388

Vulnerability Analysis

Orca HCM exposes an upload endpoint accessible to any authenticated user with standard application privileges. The endpoint fails to validate the file type, extension, and content of uploaded objects. Attackers can submit server-executable files such as .jsp, .aspx, or .php payloads instead of legitimate document or image uploads. Once written to a web-accessible directory, the file can be requested over HTTP to trigger server-side execution. This pattern, classified as [CWE-434], converts a routine business feature into a path to remote code execution. Because Orca HCM is a human capital management platform, instances commonly hold personal data, payroll information, and corporate directory content — all of which become accessible after compromise.

Root Cause

The root cause is missing or insufficient validation of uploaded file content on the server side. The application trusts client-supplied filenames and MIME types when storing files. No allowlist of permitted extensions, no MIME sniffing, and no decoupling of upload storage from the executable web root are enforced. This permits attackers to place script files inside directories that the web engine will interpret and run.

Attack Vector

Exploitation requires network access to the Orca HCM web interface and valid credentials for any low-privileged account. An attacker authenticates, navigates to a feature that accepts file uploads such as profile photos, attachments, or document submissions, and submits a crafted web shell. The attacker then requests the uploaded file's URL to execute commands on the server. No user interaction from another party and no administrative role are required.

No verified public proof-of-concept code is available. See the TWCERT Security Advisory for vendor-coordinated technical details.

Detection Methods for CVE-2025-1388

Indicators of Compromise

• Presence of script files (.jsp, .php, .aspx, .ashx) inside Orca HCM upload directories that should only contain documents or images
• Outbound connections originating from the Orca HCM application server to unfamiliar IP addresses shortly after a file upload
• Web access logs showing GET or POST requests directly to uploaded filenames in attachment or media paths
• Spawning of cmd.exe, powershell.exe, /bin/sh, or /bin/bash as a child process of the Orca HCM web server process

Detection Strategies

• Monitor file integrity in Orca HCM web root and upload folders, alerting on creation of any file with a server-executable extension
• Inspect HTTP request bodies submitted to upload endpoints for script tags, shell function names, or known web shell signatures such as c99, r57, or China Chopper patterns
• Correlate authenticated low-privilege user sessions with subsequent execution of system binaries on the application server
• Hunt for newly created files in Orca HCM directories using endpoint telemetry filtered by parent process of the web service

Monitoring Recommendations

• Forward Orca HCM web server access logs, application logs, and host process telemetry into a centralized analytics platform for retention and querying
• Build alerts that fire when the web server process spawns interactive shells or scripting interpreters
• Track authentication events on Orca HCM for anomalous activity such as login from new geographies followed by upload requests
• Review file upload volume baselines and alert on sudden spikes from individual accounts

How to Mitigate CVE-2025-1388

Immediate Actions Required

• Apply the vendor patch from LEARNING DIGITAL as referenced in the TWCERT Security Advisory without delay
• Restrict network access to Orca HCM management and upload endpoints to trusted networks or VPN users until patched
• Audit Orca HCM upload directories for unexpected executable files and remove any unauthorized content
• Rotate credentials for all Orca HCM accounts, especially any account that recently used upload functionality

Patch Information

LEARNING DIGITAL released a fixed build for Orca HCM through coordinated disclosure with TWCERT. Administrators should consult the TWCERT Incident Report and the TWCERT Security Advisory for the exact fixed version and upgrade instructions. After patching, verify the build version in the Orca HCM administration console.

Workarounds

• Place a web application firewall in front of Orca HCM with rules that block uploads containing server-script extensions or shell signatures
• Configure the web server to deny script execution within upload directories using handler mappings or .htaccess style restrictions
• Disable upload-capable features for non-essential user roles until the patched version is deployed
• Move uploaded files to storage that is not served from the web root and proxy downloads through a controller that sets a non-executable content type