{"id":40547,"date":"2025-05-19T17:38:08","date_gmt":"2025-05-19T17:38:08","guid":{"rendered":""},"modified":"2025-09-08T17:18:51","modified_gmt":"2025-09-08T23:18:51","slug":"cve-2025-42999-critical-vulnerability-in-sap-netweaver-visual-composer-metadata-uploader","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-42999-critical-vulnerability-in-sap-netweaver-visual-composer-metadata-uploader\/","title":{"rendered":"CVE-2025-42999: Critical Vulnerability in SAP NetWeaver Visual Composer Metadata Uploader<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The cybersecurity world has yet another critical vulnerability to contend with: CVE-2025-42999. This vulnerability primarily affects the SAP NetWeaver Visual Composer Metadata Uploader, which is used for uploading and managing metadata in SAP systems. This vulnerability is concerning due to the potential compromise of system<\/a> confidentiality, integrity, and availability if exploited by a malicious actor.
\nWhat makes this vulnerability particularly alarming is the fact that it can be exploited by a privileged user to upload untrusted<\/a> or malicious content. This content could potentially compromise the host system<\/a> when deserialized, leading to data leakage or a full system compromise. It is therefore crucial for organizations that utilize SAP NetWeaver to understand the nature of this vulnerability<\/a> and take immediate steps to mitigate it.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-42999
\nSeverity: Critical (CVSS score: 9.1)
\nAttack Vector: Network
\nPrivileges Required: High
\nUser Interaction: None
\nImpact: Compromise of system<\/a> confidentiality, integrity, and availability<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

SAP NetWeaver | All versions prior<\/a> to the latest patch<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability exploits the deserialization process in the SAP NetWeaver Visual Composer Metadata<\/a> Uploader. When a privileged user uploads untrusted or malicious content, this content is deserialized by the system, potentially leading to a compromise of the host system<\/a>.
\nThe malicious actors can craft a payload that, when deserialized, executes arbitrary code<\/a> of their choice. This could lead to actions such as data<\/a> extraction, installation of additional malware, or even a full takeover of the host system.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Below is a conceptual example of how the vulnerability might be exploited. This pseudocode represents a malicious payload being uploaded to the Metadata Uploader.<\/p>\n

POST \/sap\/netweaver\/vc\/metadata HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{\n\"metadata\": {\n\"file\": \"malicious_file.ser\",\n\"upload_date\": \"2025-01-01\",\n\"uploader\": \"privileged_user\"\n}\n}<\/code><\/pre>\n
In this example, `malicious_file.ser` is a serialized object that contains malicious code<\/a>. When this object is deserialized by the SAP system, the malicious code is executed<\/a>, leading to potential compromise of the system.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The cybersecurity world has yet another critical vulnerability to contend with: CVE-2025-42999. This vulnerability primarily affects the SAP NetWeaver Visual Composer Metadata Uploader, which is used for uploading and managing metadata in SAP systems. This vulnerability is concerning due to the potential compromise of system confidentiality, integrity, and availability if exploited by a malicious […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-40547","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t