xsser_scan · Kali MCP: Risk & Policy

WHAT IT DOES

What xsser_scan does on Kali

AI agents invoke xsser_scan to trigger actions in Kali. 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.

WHY IT NEEDS A POLICY

Why xsser_scan needs a policy

XSSer is an automated tool for detecting and exploiting XSS vulnerabilities. It actively injects payloads into target web applications, constituting active execution of attack code against external systems.

From the tool's definition Tool name 'xsser_scan' on a Kali Linux penetration testing server supporting 'Web扫描' (web scanning). XSSer is a well-known XSS (Cross-Site Scripting) attack/scanning framework that both detects and exploits XSS vulnerabilities in web applications.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

xsser_scan Rate-limited

xsser_scan 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": {
    "xsser_scan": {
      "limits": [
        {
          "counter": "xsser_scan_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Kali, so you can run agents against it safely.

FAQ

Questions about xsser_scan

What does the xsser_scan tool do? +

xsser_scan. It is categorised as a Execute tool in the Kali MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on xsser_scan? +

Register the Kali MCP server in PolicyLayer and add a rule for xsser_scan: 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 Kali. Nothing to install.

What risk level is xsser_scan? +

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

Can I rate-limit xsser_scan? +

Yes. Add a rate_limit block to the xsser_scan 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 xsser_scan completely? +

Set action: deny in the PolicyLayer policy for xsser_scan. 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 xsser_scan? +

xsser_scan is provided by the Kali MCP server (pentestt00ls/kali-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.