Back to skill

Security audit

JumpCloud

Security checks for vulnerabilities and agentic risk

Overview

The JumpCloud read functions fit the stated purpose, but automatic setup can execute unverified remote code and introduce broader agent changes without clear user control.

Review setup before enabling this skill. Install a verified CLI release yourself, require approval for software installation, and consider disabling automatic skill synchronization. Connect a minimally privileged JumpCloud account only if you accept OOMOL handling its credentials and data. The remote installers and hosted connector were not verified in this review.

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied command executes a remote installer and contains no JumpCloud search or read functionality. Installing unrelated software is not disclosed by the description, and the chunk provides no evidence that this installation supports the declared JumpCloud purpose. The installer’s further behavior cannot be determined from the supplied code.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command streams a mutable remote script directly into Bash without pinning or independently verifying its contents; the PowerShell alternative has the same issue. Compromise of the distribution endpoint could execute arbitrary code with the invoking user's permissions, exposing local files and credentials. The domain is relevant to the documented CLI and execution is conditional, which reduces suspicion of malicious intent but does not remove the supply-chain risk.

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

The setup workflow executes a downloaded installer without warning the user about remote code execution or system changes.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The missing-CLI fallback directs the agent to install software without first explaining the system changes or obtaining explicit approval. A user requesting JumpCloud data has not necessarily authorized local software installation; the conditional setup limits exposure but does not establish consent.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 79)May include surrounding context.

md
- **`OOMOL_INSUFFICIENT_CREDIT`** — OOMOL billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

- **HTTP 402 without `OOMOL_INSUFFICIENT_CREDIT`** — the third-party account itself has no active plan or credit. Report the provider error message as is; do not ask the user to recharge OOMOL.

## Resources