{"id":79362,"date":"2025-09-29T22:56:07","date_gmt":"2025-09-29T22:56:07","guid":{"rendered":""},"modified":"2025-10-28T11:37:28","modified_gmt":"2025-10-28T17:37:28","slug":"cve-2025-59434-cross-tenant-data-exposure-in-cloud-hosted-flowise","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-59434-cross-tenant-data-exposure-in-cloud-hosted-flowise\/","title":{"rendered":"<strong>CVE-2025-59434: Cross-Tenant Data Exposure in Cloud-Hosted Flowise<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>This blog post takes an in-depth look at the CVE-2025-59434 vulnerability, a profound flaw in the security of the drag &#038; drop user interface, Flowise. Flowise is extensively used for building customized large language models. The vulnerability enables any user on the free tier of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-57052-cjson-out-of-bounds-access-vulnerability-and-mitigation\/\"  data-wpil-monitor-id=\"86830\">Cloud-Hosted<\/a> Flowise to access sensitive environment variables from other tenants, leading to a full cross-tenant data exposure. This flaw is of significant concern to organizations and individuals who utilize Flowise Cloud, as it could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-26210-deepseek-xss-vulnerability-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"86705\">potentially lead to a system<\/a> compromise or data leakage.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-59434<br \/>\nSeverity: Critical (9.6)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-36326-bypassing-amd-romarmor-protections-to-compromise-system-security\/\"  data-wpil-monitor-id=\"87862\">System compromise<\/a>, data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1386237780\" 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>Cloud-Hosted Flowise | Prior to August 2025<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit works by abusing a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48158-pathname-traversal-vulnerability-in-buddypress-xprofile-custom-image-field\/\"  data-wpil-monitor-id=\"88324\">vulnerability in the Custom<\/a> JavaScript Function node of the Cloud-Hosted Flowise. Using this node, any <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6454-authenticated-user-exploit-in-gitlab-ce-ee-through-proxy-environments\/\"  data-wpil-monitor-id=\"90745\">authenticated user<\/a> on the free tier can access sensitive environment variables belonging to other tenants. This includes highly <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55190-argo-cd-api-tokens-expose-sensitive-repository-credentials\/\"  data-wpil-monitor-id=\"87006\">sensitive data such as OpenAI API<\/a> keys, AWS credentials, Supabase tokens, and Google Cloud secrets, leading to a full cross-tenant data exposure.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4064435319\" 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>Given the nature of this vulnerability, a malicious user might exploit it with a custom script. A simplified, conceptual example of an exploit might look like this:<\/p>\n<pre><code class=\"\" data-line=\"\">\/\/ Assuming the attacker has authenticated to the service\nconst flowise = getAuthenticatedFlowiseInstance();\n\/\/ Accessing the vulnerable function\nconst customJsFunction = flowise.getNode(&#039;Custom JavaScript Function&#039;);\n\/\/ Attempting to access sensitive environment variables\nconst sensitiveData = customJsFunction.execute(&#039;process.env&#039;);\nconsole.log(sensitiveData);<\/code><\/pre>\n<p>In the above example, the attacker exploits the vulnerability by <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7388-remote-command-execution-via-java-rmi-interface-in-openedge-adminserver\/\"  data-wpil-monitor-id=\"87029\">executing a command<\/a> to access the environment variables, thereby potentially gaining access to the secrets of other tenants.<\/p>\n<p><strong>Mitigation and Recommendations<\/strong><\/p>\n<p>The issue has been patched in the August 2025 version of Cloud-Hosted Flowise. Users are strongly recommended to update to the latest <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30325-integer-overflow-vulnerability-in-photoshop-desktop-versions-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"91674\">version to mitigate this vulnerability<\/a>. In cases where an immediate update is not possible, the use of a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as a temporary mitigation measure. However, these measures do not resolve the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43728-protection-mechanism-failure-vulnerability-in-dell-thinos\/\"  data-wpil-monitor-id=\"90281\">vulnerability but merely protect<\/a> against it. Therefore, an update should be implemented as soon as <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-10534-critical-firefox-and-thunderbird-vulnerability-leading-to-possible-system-compromise-and-data-leakage\/\"  data-wpil-monitor-id=\"89452\">possible to ensure data<\/a> security.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview This blog post takes an in-depth look at the CVE-2025-59434 vulnerability, a profound flaw in the security of the drag &#038; drop user interface, Flowise. Flowise is extensively used for building customized large language models. The vulnerability enables any user on the free tier of the Cloud-Hosted Flowise to access sensitive environment variables from [&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":[91],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-79362","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-google"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/79362","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=79362"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/79362\/revisions"}],"predecessor-version":[{"id":84843,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/79362\/revisions\/84843"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=79362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=79362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=79362"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=79362"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=79362"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=79362"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=79362"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=79362"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=79362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}