{"id":79355,"date":"2025-09-29T15:53:07","date_gmt":"2025-09-29T15:53:07","guid":{"rendered":""},"modified":"2025-10-07T14:30:05","modified_gmt":"2025-10-07T20:30:05","slug":"cve-2025-59528-critical-remote-code-execution-vulnerability-in-flowise-3-0-5","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-59528-critical-remote-code-execution-vulnerability-in-flowise-3-0-5\/","title":{"rendered":"<strong>CVE-2025-59528: Critical Remote Code Execution Vulnerability in Flowise 3.0.5<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Common Vulnerabilities and Exposures system has recently identified a critical vulnerability in Flowise 3.0.5, a popular drag &#038; drop user interface used to build customized large language model flows. The vulnerability, officially designated as CVE-2025-59528, poses a significant risk to the security of any system running the affected version of Flowise. It allows for remote code execution, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-26210-deepseek-xss-vulnerability-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"86686\">potentially leading to system<\/a> compromise, data leakage, and other severe consequences.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-59528<br \/>\nSeverity: Critical (10.0 CVSS Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: Remote <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47099-heap-based-buffer-overflow-vulnerability-in-incopy-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"86801\">Code Execution leading<\/a> to potential system compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2811114134\" 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: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\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: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\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: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>Flowise | 3.0.5<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability resides in the CustomMCP node, which allows users to input configuration settings for connecting to an external MCP server. During this process, user-provided input is converted into a JavaScript string without any security validation. This input is then passed directly to the Function() constructor, which evaluates and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47127-arbitrary-code-execution-vulnerability-in-adobe-framemaker\/\"  data-wpil-monitor-id=\"87062\">executes it as JavaScript code<\/a>. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-25737-critical-vulnerability-in-kapsch-trafficcom-rsus-due-to-lack-of-secure-password-requirements\/\"  data-wpil-monitor-id=\"89228\">Due to the lack of any security<\/a> measures, this process runs with full Node.js runtime privileges, allowing it to access potentially dangerous modules such as child_process and fs.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-294190803\" 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 this vulnerability might be exploited:<\/p>\n<pre><code class=\"\" data-line=\"\">let mcpServerConfig = `{\n&quot;mcpServer&quot;: &quot;https:\/\/mcpserver.com&quot;,\n&quot;credentials&quot;: &quot;root&quot;,\n&quot;command&quot;: &quot;require(&#039;child_process&#039;).exec(&#039;rm -rf \/ --no-preserve-root&#039;)&quot;\n}`;\nlet malicious_payload = new Function(&#039;return &#039; + mcpServerConfig)();\nmalicious_payload();<\/code><\/pre>\n<p>In the above pseudocode, a malicious user can craft a configuration string that includes a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7388-remote-command-execution-via-java-rmi-interface-in-openedge-adminserver\/\"  data-wpil-monitor-id=\"87016\">command to be executed<\/a> on the server (in this case, a command to delete all files). This configuration string is then passed to the Function() constructor, which <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-56803-arbitrary-os-command-execution-vulnerability-in-figma-desktop-for-windows\/\"  data-wpil-monitor-id=\"87073\">executes the command<\/a> as JavaScript code with full Node.js runtime privileges. This could lead to catastrophic results, including total <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-36326-bypassing-amd-romarmor-protections-to-compromise-system-security\/\"  data-wpil-monitor-id=\"87865\">system compromise<\/a>.<br \/>\nNote: The above example is purely conceptual and simplifies the actual process for understanding. Actual exploits may be significantly more complex and vary greatly in their implementation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Common Vulnerabilities and Exposures system has recently identified a critical vulnerability in Flowise 3.0.5, a popular drag &#038; drop user interface used to build customized large language model flows. The vulnerability, officially designated as CVE-2025-59528, poses a significant risk to the security of any system running the affected version of Flowise. It allows [&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":[80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-79355","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/79355","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=79355"}],"version-history":[{"count":7,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/79355\/revisions"}],"predecessor-version":[{"id":82064,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/79355\/revisions\/82064"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=79355"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=79355"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=79355"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=79355"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=79355"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=79355"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=79355"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=79355"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=79355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}