{"id":"CVE-2025-8943","aliases":["EUVD-2025-24801","GHSA-2vv2-3x8x-4gv7"],"status":"published","title":"Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers","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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.75296,"percentile":0.99517,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-306","CWE-78","CWE-862"],"published":"2025-08-14T09:54:22Z","modified":"2026-10-28T02:31:01Z","exploits":[{"source":"metasploit","id":"exploit/multi/http/flowise_custommcp_rce","title":"Flowise Custom MCP Remote Code Execution","type":"exploit","platform":"Linux,Unix,Windows","date":"2025-08-14","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/multi/http/flowise_custommcp_rce"},{"source":"nuclei","id":"CVE-2025-8943","title":"Flowise \u003c 3.0.1 - Remote Command Execution","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-8943.yaml"}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"flowise","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.0.5"}]}]},{"source":"osv","ecosystem":"npm","package":"flowise","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"3.0.5"}]}]}],"products":[{"vendor":"flowiseai","product":"flowise"}],"references":[{"url":"https://research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578/","tags":["third-party-advisory","Exploit","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-8943","tags":["advisory"]},{"url":"https://research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578","tags":["web"]},{"url":"https://github.com/advisories/GHSA-2vv2-3x8x-4gv7"},{"url":"https://www.npmjs.com","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/8xxx/CVE-2025-8943.json","tags":["advisory"]},{"url":"https://github.com/FlowiseAI/Flowise","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-8943","title":"Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers","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.","status":"published","published":"2025-08-14T09:54:22.531Z","modified":"2025-08-18T16:47:58.906Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-306","CWE-862"],"updated_at":"2026-11-02T14:32:38.025852Z"}],"euvd":[{"id":"EUVD-2025-24801","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.","status":"published","published":"2025-08-14T09:54:22Z","modified":"2025-08-18T16:47:58Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T20:31:56.298799Z"}],"ghsa":[{"id":"GHSA-2vv2-3x8x-4gv7","title":"Flowise OS command remote code execution","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.","status":"published","published":"2025-08-14T12:30:23Z","modified":"2025-08-18T21:07:49Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-78","CWE-306"],"updated_at":"2026-11-02T14:38:53.767052Z"}],"nvd":[{"id":"CVE-2025-8943","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.","status":"published","published":"2025-08-14T10:15:29.637Z","modified":"2026-06-17T10:07:59.88Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-306","CWE-862"],"updated_at":"2026-11-02T14:11:23.594522Z"}],"osv":[{"id":"CVE-2025-8943","title":"Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers","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.","status":"published","published":"2025-08-14T09:54:22.531Z","modified":"2026-10-28T02:31:01.605280746Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:53.185592Z"},{"id":"GHSA-2vv2-3x8x-4gv7","title":"Flowise OS command remote code execution","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.","status":"published","published":"2025-08-14T12:30:23Z","modified":"2025-08-18T21:07:48Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-306","CWE-78"],"updated_at":"2026-11-02T15:46:34.700741Z"}]}}