CVE-2025-31324: SAP NetWeaver Authorization Bypass Flaw

CVE-2025-31324 Overview

SAP NetWeaver Visual Composer Metadata Uploader is not protected with a proper authorization, allowing unauthenticated agent to upload potentially malicious executable binaries that could severely harm the host system. This could significantly affect the confidentiality, integrity, and availability of the targeted system.

Critical Impact
An unauthenticated attacker could exploit this vulnerability to upload and execute malicious binaries, potentially compromising the entire host system and allowing full control over the affected system.

Affected Products

SAP NetWeaver 7.50

Discovery Timeline

{{ DISCOVERY_DATE }} - Vulnerability discovered by {{ RESEARCHER_NAME }}
{{ DISCLOSURE_DATE }} - Responsible disclosure to SAP
{{ CVE_ASSIGNED_DATE }} - CVE-2025-31324 assigned
{{ PATCH_DATE }} - SAP releases security patch
2025-04-24 - CVE-2025-31324 published to NVD
2025-10-31 - Last updated in NVD database

Technical Details for CVE-2025-31324

Vulnerability Analysis

This vulnerability arises from improper authorization checks within the SAP NetWeaver Visual Composer Metadata Uploader. An unauthenticated user can leverage this weakness to upload arbitrary executable files to the system, which can be triggered remotely to execute malicious payloads.

Root Cause

The root cause of CVE-2025-31324 is the missing authorization check in the metadata uploader module, which fails to authenticate and validate requests adequately.

Attack Vector

This vulnerability can be exploited over the network without requiring authentication, given that the attacker has network access to the vulnerable SAP NetWeaver service.

python

# Example exploitation code (sanitized)
import requests

url = "http://target-system/sapNetweaverUploader"
files = {'file': open('malicious_binary.exe', 'rb')}
response = requests.post(url, files=files)
print(response.status_code)

Detection Methods for CVE-2025-31324

Indicators of Compromise

Unauthorized file uploads detected
Unexpected executable files in SAP NetWeaver directories
Unusual network traffic to the SAP NetWeaver instance

Detection Strategies

Utilize file integrity monitoring and network intrusion detection systems to identify unauthorized uploads and traffic patterns indicating exploitation attempts.

Monitoring Recommendations

Apply deep packet inspection to monitor for file upload requests and deploy continuous monitoring solutions like SentinelOne to detect anomalous system behavior associated with this vulnerability.

How to Mitigate CVE-2025-31324

Immediate Actions Required

Apply the most recent security patches provided by SAP immediately.
Restrict network access to SAP NetWeaver instances to trusted entities.
Monitor log files for any unauthorized access and file uploads.

Patch Information

SAP has released a patch to address this vulnerability, available through their official security advisory: SAP Security Patch Day.

Workarounds

If immediate patching is not possible, disable the metadata uploader functionality temporarily and implement network-level security measures to isolate the vulnerable system.

bash

# Example workaround configuration - disabling metadata uploader service
systemctl disable sapnetweaver-metadataloader.service
systemctl stop sapnetweaver-metadataloader.service