{"id":"CVE-2025-8943","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-8943","generatedAt":"2026-11-02T16:02:58.504Z","title":"The Custom MCPs feature is designed to execute OS commands, for instance, using tools like `npx` to spin up local MCP Servers.","description":"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.","published":"2025-08-14T10:15:30.000Z","lastModified":"2026-06-17T10:08:00.000Z","status":"Analyzed","sourceIdentifier":"reefs@jfrog.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-306","CWE-862"],"affected":["flowiseai/flowise"],"epss":{"score":0.75203,"percentile":0.99512,"date":"2026-11-01","history":[{"date":"2026-10-04","score":0.74787,"percentile":0.99493}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 75.2%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-10-04T00:00:00.000Z","detail":{"to":0.74787,"from":0.65771,"percentile":0.99493},"summary":"EPSS moved from 65.8% to 74.8% probability of exploitation in the next thirty days."}],"references":[{"url":"https://research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578/","tags":["Exploit","Third Party Advisory"],"source":"reefs@jfrog.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-8943","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}