Loading vulnerability…
CVE-2025-8943 is a critical remote code execution vulnerability in Flowise affecting versions prior to 3.0.1. The issue is exposed through the Custom MCPs functionality and the /api/v1/node-load-method/customMCP API endpoint. Custom MCPs are intended to execute operating system commands, for example by invoking tools such as npx to start local MCP servers. In affected versions, Flowise has minimal authentication and authorization controls, lacks RBAC, and default installations may run without authentication unless explicitly configured. As a result, a remote attacker can submit a crafted JSON payload to the customMCP endpoint and cause Flowise to execute attacker-controlled, unsandboxed OS commands. Publicly referenced example payloads show control over mcpServerConfig.command and mcpServerConfig.args, demonstrating direct command execution on the host.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No valid public exploits. Mallory filtered out 3 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
17 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remote code execution vulnerability in Flowise, referenced as part of Metasploit module PRs.
A Flowise-related vulnerability that the content says is being actively exploited and is included in VulnCheck's Known Exploited Vulnerabilities catalog, but no technical details are provided.
A missing authentication vulnerability in Flowise that was flagged for active exploitation by VulnCheck's Canary network.
A previously disclosed Flowise vulnerability referenced as one of the earlier Flowise flaws actively exploited in the wild.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.