CVE-2025-59527 is a high-severity server-side request forgery (SSRF) vulnerability in flowise (npm), affecting versions = 3.0.5. It is fixed in 3.0.6.
Summary A Server-Side Request Forgery (SSRF) vulnerability was discovered in the /api/v1/fetch-links endpoint of the Flowise application. This vulnerability allows an attacker to use the Flowise server as a proxy to access internal network web services and explore their link structures. The impact includes the potential exposure of sensitive internal administrative endpoints. Details Vulnerability Overview The fetch-links feature in Flowise is designed to extract links from external websites or XML sitemaps. It performs an HTTP request from the server to the user-supplied URL and parses the response (HTML or XML) to extract and return links. The issue arises because the feature performs these HTTP requests without validating the user-supplied URL. In particular, when the relativeLinksMethod parameter is set to webCrawl or xmlScrape, the server directly calls the fetch() function with the provided URL, making it vulnerable to SSRF attacks. Root Cause The fetch() function is called without URL validation or restriction, which enables attackers to redirect the server to internal services. Taint Flow • Taint 01: Route Registration https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/controllers/fetch-links/index.ts#L6-L24 • Taint 02: Service https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/services/fetch-links/index.ts#L8-L18 • Taint 03: xmlScrape https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/src/utils.ts#L474-L478 PoC PoC Description This vulnerability was verified in a local development environment. The Flowise server was running at http://localhost:3000, and authentication was performed using the Bearer token: Upon a successful attack, the Flowise server returned the entire link structure of the internal admin panel in JSON format. The response included sensitive administrative URLs such as: /api/users (User Management) /api/secrets (API Keys) /api/database (Database Config) This demonstrated that an attacker could enumerate internal web service structures. Internal Admin Server (Mock) curl Request Example <img width="1914" height="952" alt="image" src="https://github.com/user-attachments/assets/6cb1abb1-0a31-43d4-8d9e-8d45f58051f3" /> Impact This is a Server-Side Request Forgery (SSRF) vulnerability. Who is impacted? Any user running Flowise server exposed to external traffic. Risk: Attackers can leverage the Flowise server to: Explore internal web applications Bypass firewall rules Access sensitive administrative interfaces Leak internal configuration, credentials, or secrets This vulnerability significantly increases the risk of internal service enumeration and potential lateral movement in an enterprise environment.
Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside. Typical impact: access to internal metadata services, internal APIs, or cloud credentials.
CVE-2025-59527 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (3.0.6). Upgrading removes the vulnerable code path.
npm
flowise (= 3.0.5)flowise → 3.0.6 (npm)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
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Already deployed Kodem? See CVE-2025-59527 in your environment →Upgrade flowise to 3.0.6 or later to resolve this vulnerability.
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CVE-2025-59527 is a high-severity server-side request forgery (SSRF) vulnerability in flowise (npm), affecting versions = 3.0.5. It is fixed in 3.0.6. Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside.
CVE-2025-59527 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
flowise (npm) versions = 3.0.5 is affected.
Yes. CVE-2025-59527 is fixed in 3.0.6. Upgrade to this version or later.
Whether CVE-2025-59527 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
Upgrade flowise to 3.0.6 or later.