CVE-2025-8943

criticalpriority · track · 36OT risk · elevatedEPSS 0.752 · 100 %ileexploit · weaponizedDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · weaponized

Likely / severe?

75.2% (100th) EPSS

CVSS 9.8 · critical

Is it mine?

4 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

The Custom MCPs feature is designed to execute OS commands, for instance, using tools like `npx` to spin up local MCP Servers. However, Flowise's inherent authentication and authorization model is minimal and lacks role-based access controls (RBAC). Furthermore, in Flowise versions before 3.0.1 the default installation operates without authentication unless explicitly configured. This combination allows unauthenticated network attackers to execute unsandboxed OS commands.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · reefs@jfrog.comexploitability 3.9 · impact 5.9

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-306USCWE-306USCWE-306USCWE-78USCWE-862USCWE-862US

exploits (1)

Public proof-of-concept and weaponised exploit code.

exploit/multi/http/flowise_custommcp_rceFlowise Custom MCP Remote Code Executionweaponized · metasploit

affected products (4)

Products and version ranges known to be affected.

Open Source Flowiseall versionscert_bundDEcpe:/a:flowiseai:flowise:-
Flowise AI Flowise≤ 3.0.1fstec_bduRU
flowiseai flowise< 3.0.1nvdUScpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*
npm flowise≤ 3.0.5osvUSpkg:npm/flowise

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1836Flowise: Mehrere Schwachstellen ermöglichen CodeausführungDeutsch2025-08-13csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Flowise ausnutzen, um beliebigen Programmcode oder Kommandos auszuführen.
GHSA-2vv2-3x8x-4gv7Flowise OS command remote code execution2025-08-14ghsa · osvUS
The Custom MCPs feature is designed to execute OS commands, for instance, using tools like `npx` to spin up local MCP Servers. However, Flowise's inherent authentication and authorization model is minimal and lacks role-based access controls (RBAC). Furthermore, in Flowise versions before 3.0.1 the default installation operates without authentication unless explicitly configured. This combination allows unauthenticated network attackers to execute unsandboxed OS commands.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd osv NVD CVE.org MITRE

published 2025-08-14modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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