run_crlfuzz

A execute tool on the Pentester- MCP server.

SERVERPentester-MCP SOURCEhalilkirazkaya/pentester-mcp

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/halilkirazkaya-pentester-mcp/run-crlfuzz.md

WHAT IT DOES

What run_crlfuzz does on Pentester-MCP

AI agents invoke run_crlfuzz to trigger actions in Pentester-MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why run_crlfuzz is rated High

CRLFUZZ executes fuzzing operations against web targets to identify CRLF injection vulnerabilities. This is an Execute category tool because it runs automated exploitation code whose effects (network requests, injection attempts, potential access/data extraction on vulnerable targets) depend entirely on the arguments provided (target URL, injection payloads, etc.).

From the tool's definition Tool name 'run_crlfuzz' indicates execution of CRLFUZZ (a CRLF injection fuzzing tool). Server description explicitly states the MCP enables 'autonomously execute over 200 open-source penetration testing tools' including 'web exploitation'.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs run_crlfuzz safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Pentester-MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For run_crlfuzz, this is the rule to start with:

run_crlfuzz Rate-limited

run_crlfuzz stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "run_crlfuzz": {
      "limits": [
        {
          "counter": "run_crlfuzz_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Pentester-MCP, apply this rule, and every run_crlfuzz call is checked against it from then on.

FAQ

Questions about run_crlfuzz

What does the run_crlfuzz tool do? +

run_crlfuzz is a execute tool on the Pentester MCP server. It is categorised as a Execute tool in the Pentester-MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on run_crlfuzz? +

Register the Pentester MCP server in PolicyLayer and add a rule for run_crlfuzz: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Pentester-MCP. Nothing to install.

What risk level is run_crlfuzz? +

run_crlfuzz is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit run_crlfuzz? +

Yes. Add a rate_limit block to the run_crlfuzz rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block run_crlfuzz completely? +

Set action: deny in the PolicyLayer policy for run_crlfuzz. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides run_crlfuzz? +

run_crlfuzz is provided by the Pentester MCP server (halilkirazkaya/pentester-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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