CVE Feed

    Dashboard / CVE / CVE-2025-59528

    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 external MCP server. This node parses the user-provided mcpServerConfig string to build the MCP server configuration. However, during this process, it executes JavaScript code without any security validation. Specifically, inside the convertToValidJSONString function, user input is directly passed to the Function() constructor, which evaluates and executes the input as JavaScript code. Since this runs with full Node.js runtime privileges, it can access dangerous modules such as child_process and fs. This issue has been patched in version 3.0.6.

    Published:Sep 22, 2025
    Last Modified:Sep 23, 2025
    EPS:Sep 22, 2025
    EPSS Score:0.00372
    CVSS Score:10

    Affected Products

    Vendor
    Flowiseai
    Product
    Flowise

    Exploits

    https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-3gcm-f6qx-ff7phttps://www.exploit-db.com/exploits/52440https://github.com/Ashwesker/Blackash-CVE-2025-59528https://github.com/corey-farley/CVE-2025-59528-Flowise-RCEhttps://github.com/hackpatato/PoC-and-yara-rules-of-CVE-2025-59528-Flowise-has-Remote-Code-Execution-vulnerabilityhttps://github.com/im-nymii/CVE-2025-59528https://github.com/Loaxert/CVE-2025-59528-PoChttps://github.com/mananispiwpiw/CVE-2025-59528-PoChttps://github.com/maradonam18/-CVE-2025-59528-PoChttps://github.com/Moon-Harvest/CVE-2025-59528https://github.com/NymiiTechTips/CVE-2025-59528https://github.com/r3nsi15/Flowise-RCE-CVE-2025-59528https://github.com/sonnelon/CVE-2025-59528-PoChttps://github.com/UsifAraby/CVE-2025-59528-POChttps://github.com/vanhari/CVE-2025-59528https://github.com/zimshk/CVE-2025-59528.yaml

    Related CVEs

    CVE-2026-52098 (CVSS 9.8) — An issue in Flowise 3.1.2 allows a remote attacker to execute arbitrary code via the /api/v1/prediction/<flowI…
    CVE-2026-73604 (CVSS 7.1) — Flowise before 3.1.3 contains an incomplete credential redaction vulnerability in the GET /api/v1/credentials/…
    CVE-2026-73603 (CVSS 6.3) — Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-speech endpoint, all…
    CVE-2026-73602 (CVSS 9) — Flowise before 3.1.3 contains a sandbox escape vulnerability in the vm2 JavaScript sandbox that allows authent…
    CVE-2026-73601 (CVSS 9) — Flowise versions before 3.1.3 contain a remote code execution vulnerability in the Custom MCP node when CUSTOM…
    CVE-2026-73488 (CVSS 6) — Flowise versions before 3.1.3 contain an insecure direct object reference vulnerability in the GET /api/v1/org…
    CVE-2026-73487 (CVSS 9) — Flowise before 3.1.3 contains a regex-based Python code validator bypass in CSV and Airtable Agent nodes that …
    CVE-2026-73486 (CVSS 9) — Flowise before 3.1.3 contains a code injection vulnerability in the CSV Agent node's customReadCSV parameter t…
    CVE-2026-73485 (CVSS 9) — Flowise before 3.1.3 contains a code injection vulnerability in the Airtable Agent node that allows unauthenti…
    CVE-2026-73484 (CVSS 8.6) — Flowise before 3.1.3 contains a sandbox escape vulnerability in pythonCodeValidator.ts that fails to block nat…

    References

    https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L132
    https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L220
    https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L262-L270
    https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/controllers/nodes/index.ts#L57-L78
    https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/routes/node-load-methods/index.ts#L5
    https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/services/nodes/index.ts#L91-L94
    https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.0.6
    https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-3gcm-f6qx-ff7p

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High