RCE in Flowiseai Flowise
CVE-2025-59528
Flowise is a drag & drop user interface to build a customized large language model flow. In version 3.0.5, Flowise is vulnerable to remote code execution. The CustomMCP node allows users to input configuration settings for connecting to an…
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.862 (99.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Flowiseai Flowise — versions = 3.0.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-3gcm-f6qx-ff7p (x_refsource_CONFIRM)
- https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L132 (x_refsource_MISC)
- https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L220 (x_refsource_MISC)
- https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L262-L270 (x_refsource_MISC)
- https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/controllers/nodes/index.ts#L57-L78 (x_refsource_MISC)
- https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/routes/node-load-methods/index.ts#L5 (x_refsource_MISC)
- https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/services/nodes/index.ts#L91-L94 (x_refsource_MISC)
- https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.0.6 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-59528?
- CVE-2025-59528 is a critical-severity vulnerability in Flowiseai Flowise, classified under Code Injection. CVSS score: 10.0/10. Published 2025-09-22.
- How severe is CVE-2025-59528?
- Critical severity. CVSS v3 base score is 10.0 out of 10.
- Is CVE-2025-59528 known to be exploited?
- 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.