CVE-2025-8943 (GCVE-0-2025-8943)

Vulnerability from cvelistv5 – Published: 2025-08-14 09:54 – Updated: 2025-08-18 16:47
VLAI Previdian
Title
Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-14 13:36 UTC
CWE
  • CWE-306 - Missing Authentication for Critical Function
  • CWE-862 - Missing Authorization
Assigner
JFROG CNA under the mitre root
CNA scorecard C 75/100 over 62 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Affected: 0 , < 3.0.1 (semver)
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 5259d1f5-62d2-4d60-92e4-4b7ff2039eba

Vulnerability ID: CVE-2025-8943

Status: Confirmed

Status Updated: 2026-08-05 08:45 UTC

Exploited: Yes

Timestamps
First Seen: 2026-08-05
Asserted: 2026-08-05
Scope
Notes: Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers | CVSS: 9.8 (CRITICAL) | EPSS: 0.7231 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers
Vendor
Product
Added Date 2026-08-05T08:45:39.489Z
Cvss Score 9.8
Epss Score 0.7231
Cvss Severity CRITICAL
Epss Percentile 0.99378
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-08-05 09:00 UTC | Updated: 2026-08-05 09:00 UTC
Show details on NVD website
To clipboard 

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