{"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":"<strong>CVE-2025-42999: Critical Vulnerability in SAP NetWeaver Visual Composer Metadata Uploader<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>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 <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-20698-windows-kernel-elevation-of-privilege-vulnerability-a-threat-to-system-security\/\"  data-wpil-monitor-id=\"47217\">vulnerability is concerning due to the potential compromise of system<\/a> confidentiality, integrity, and availability if exploited by a malicious actor.<br \/>\nWhat makes this vulnerability particularly alarming is the fact that it can be exploited by a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-7032-security-flaw-allowing-privilege-escalation-through-untrusted-data-deserialization\/\"  data-wpil-monitor-id=\"47539\">privileged user to upload untrusted<\/a> or malicious content. This content could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-34333-critical-vulnerability-in-ami-s-spx-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"47601\">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 <a href=\"https:\/\/www.ameeba.com\/blog\/building-a-cybersecurity-first-culture-a-crucial-step-for-u-s-manufacturing\/\"  data-wpil-monitor-id=\"45633\">SAP NetWeaver to understand the nature of this vulnerability<\/a> and take immediate steps to mitigate it.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-42999<br \/>\nSeverity: Critical (CVSS score: 9.1)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: High<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31263-critical-memory-handling-vulnerability-could-lead-to-system-compromise-or-data-leakage-in-macos-sequoia-15-4\/\"  data-wpil-monitor-id=\"57032\">Compromise of system<\/a> confidentiality, integrity, and availability<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-647049633\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 720px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 22px; font-weight: 600; display: flex; align-items: center; letter-spacing: -0.02em;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 10px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 42px; height: 42px;\" \/>\r\n    <\/a>\r\n    Share secrets securely\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 14px; color: #d1d5db;\">\r\n    Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 18px; color: #a1a1aa;\">\r\n    Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 24px; color: #e4e4e7;\">\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Encrypted identity<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Private Spaces for organizations and teams<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 End-to-end encrypted chat, calls, files, and notes<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Sensitive AI work and protected collaboration<\/li>\r\n    <li>\u2022 Built for information that cannot leak<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px; color: #ffffff;\">\r\n    Our mission is to secure human work alongside AI.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Download Ameeba\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Learn More\r\n    <\/a>\r\n  <\/div>\r\n<\/div><\/div>\n<p>Product | Affected Versions<\/p>\n<p>SAP NetWeaver | All <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47269-session-token-exposure-in-code-server-prior-to-version-4-99-4\/\"  data-wpil-monitor-id=\"46748\">versions prior<\/a> to the latest patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability exploits the deserialization process in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-31585-critical-file-upload-vulnerability-in-grocery-cms-php-restful-api-v1-3\/\"  data-wpil-monitor-id=\"45342\">SAP NetWeaver Visual Composer Metadata<\/a> Uploader. When a privileged user uploads untrusted or malicious content, this content is deserialized by the system, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-34332-critical-vulnerability-in-ami-s-spx-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"47560\">potentially leading to a compromise of the host system<\/a>.<br \/>\nThe malicious actors can craft a payload that, when deserialized, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-44022-arbitrary-code-execution-vulnerability-in-vvveb-cms-v-1-0-6\/\"  data-wpil-monitor-id=\"45353\">executes arbitrary code<\/a> of their choice. This could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-49835-memory-corruption-vulnerability-leading-to-potential-data-leakage-or-system-compromise\/\"  data-wpil-monitor-id=\"58414\">lead to actions such as data<\/a> extraction, installation of additional malware, or even a full takeover of the host system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2973625306\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>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<pre><code class=\"\" data-line=\"\">POST \/sap\/netweaver\/vc\/metadata HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{\n&quot;metadata&quot;: {\n&quot;file&quot;: &quot;malicious_file.ser&quot;,\n&quot;upload_date&quot;: &quot;2025-01-01&quot;,\n&quot;uploader&quot;: &quot;privileged_user&quot;\n}\n}<\/code><\/pre>\n<p>In this example, `malicious_file.ser` is a serialized object that contains <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8714-critical-postgresql-vulnerability-allowing-malicious-code-injection-by-superusers\/\"  data-wpil-monitor-id=\"80696\">malicious code<\/a>. When this object is deserialized by the SAP system, the malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29509-critical-remote-code-execution-vulnerability-in-jan-v0-5-14\/\"  data-wpil-monitor-id=\"45550\">code is executed<\/a>, leading to potential compromise of the system.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>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 [&hellip;]<\/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,"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":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/40547","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=40547"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/40547\/revisions"}],"predecessor-version":[{"id":73121,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/40547\/revisions\/73121"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=40547"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=40547"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=40547"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=40547"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=40547"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=40547"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=40547"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=40547"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=40547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}