AI agents invoke run_joomscan 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.
JoomScan is an active web application scanner that probes target Joomla installations for vulnerabilities, misconfigurations, and exploitable components. It executes network requests against external targets, making it an Execute-category tool. The server context confirms tools are run autonomously against targets. Misuse could involve unauthorized scanning of third-party systems, hence high severity.
From the tool's definition Tool name 'run_joomscan' on a server explicitly designed to 'autonomously execute over 200 open-source penetration testing tools' including 'web exploitation'. JoomScan is a well-known Joomla CMS vulnerability scanner used in penetration testing.
Documented attack patterns abuse exactly the kind of access run_joomscan gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Pentester-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for run_joomscan:
{
"version": "1",
"default": "deny",
"tools": {
"run_joomscan": {
"limits": [
{
"counter": "run_joomscan_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}run_joomscan 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.
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run_joomscan. 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.
Register the Pentester- MCP server in PolicyLayer and add a rule for run_joomscan: 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.
run_joomscan is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the run_joomscan 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.
Set action: deny in the PolicyLayer policy for run_joomscan. 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.
run_joomscan 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.
Start from Pentester-MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
337 Pentester-MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.