SAP NetWeaver Visual Composer Metadata Uploader Unauthenticated Remote Code Execution (RCE) Vulnerability (CVE-2025-31324)
Executive & SecOps Summary
SECOPS ASSESSMENTSAP systems utilizing the SAP NetWeaver Visual Composer Metadata Uploader component.
Unauthenticated remote attackers can upload malicious executable binaries (such as web shells), leading to complete compromise of system confidentiality, integrity, and availability.
Immediately apply the official security patch (SAP Note 3594142) and restrict external access to the Metadata Uploader endpoints.
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Deploy the official security patch by applying SAP Note 3594142 via the SAP Support Portal. Use the Software Update Manager (SUM) or Support Package Manager (SPM) to upgrade the affected Visual Composer software components to the patched release.
2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, block external access to the vulnerable Metadata Uploader endpoints using a reverse proxy or Web Application Firewall (WAF).
# Nginx configuration to block unauthorized access to the Metadata Uploader
server {
listen 443 ssl;
server_name sap-portal.company.com;
# Block access to Visual Composer Metadata Uploader
location ~* /VC/.*MetadataUploader {
deny all;
return 403 'Access Denied: Unauthorized access to Metadata Uploader is restricted.';
}
location / {
proxy_pass http://sap_java_backend;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}3. Log Audit & IoC Verification Commands
Execute the following script on the SAP application host to inspect HTTP access logs for potential exploitation attempts targeting the Metadata Uploader.
#!/bin/bash
# Search SAP NetWeaver Java HTTP access logs for Metadata Uploader activity
LOG_PATH='/usr/sap/*/j2ee/cluster/server*/log/system'
echo '[+] Searching for potential CVE-2025-31324 exploitation attempts...'
if [ -d /usr/sap ]; then
# Scan for POST requests to MetadataUploader returning successful status codes (200/201)
grep -riE 'MetadataUploader' $LOG_PATH | grep -E 'POST|GET' | grep -E ' 200 | 201 ' > /tmp/detected_exploits.log
if [ -s /tmp/detected_exploits.log ]; then
echo '[!] ALERT: Potential exploitation attempts detected in logs:'
cat /tmp/detected_exploits.log
else
echo '[+] No suspicious Metadata Uploader activity detected.'
fi
else
echo '[-] SAP directory structure not found.'
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Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2025-31324) is a critical-severity unrestricted file upload flaw (CWE-434) in the Metadata Uploader component of SAP NetWeaver Visual Composer, carrying a CVSS score of 9.8. The root cause is the complete absence of proper authorization and authentication checks on the upload endpoint, allowing any unauthenticated network agent to interact with the file upload functionality.
2. Exploitation Mechanics & Attack Scenario
An attacker can exploit this vulnerability by sending a crafted HTTP POST request containing a malicious payload directly to the Metadata Uploader endpoint. Because the application fails to validate the user's identity or restrict the uploaded file types, the attacker can upload executable binaries or web shells into directories accessible by the web server. Once uploaded, the attacker can execute arbitrary commands under the security context of the SAP service account by requesting the uploaded file.
3. Infrastructure & Business Impact
This vulnerability is actively exploited in the wild and is listed on the CISA KEV catalog, with an EPSS score of 0.9949, indicating an extremely high likelihood of exploitation. Successful exploitation allows full remote code execution (RCE) on the host system, potentially leading to unauthorized access to sensitive business data, lateral movement within the corporate network, and deployment of ransomware.
Official Vendor Advisories & References
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.
Frequently Asked SecOps Questions (CVE-2025-31324)
FAQQ1. How critical is CVE-2025-31324 and is it actively exploited in the wild?
CVE-2025-31324 is rated CVSS 9.8 (CRITICAL) with a 30-day EPSS exploitation probability of 99.5%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2025-31324?
Primary impacted vendors include sap across netweaver_visual_composer. Scope summary: SAP NetWeaver systems running Visual Composer Metadata Uploader (Refer to SAP Note 3594142 for specific component versions)
Q3. What temporary mitigations or workarounds exist for CVE-2025-31324 before patching?
[Mitigation] Immediately apply the official security patch (SAP Note 3594142) and restrict external access to the Metadata Uploader endpoints. Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
Generate an Internal Engineering Notice or CISO Report for CVE-2025-31324
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