Back to skill

Security audit

Kintone

Security checks for vulnerabilities and agentic risk

Overview

The Kintone features fit the stated purpose, but setup directs the agent to execute downloaded code without verification or a clear approval step.

Review and approve CLI installation separately before allowing setup to run. Check any bundled agent-skill changes and connect only the Kintone account you intend OOMOL to access. The remote installer contents remain unverified; the review found no artifact-backed evidence of malicious intent.

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
98% confidence
Finding

The supplied chunk executes a remote installer and contains no Kintone search or read operations. Although dependency installation can be a supporting implementation detail, the supplied content establishes no connection between this installer and the declared Kintone functionality. The downloaded script's contents and additional effects cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a downloaded script directly into Bash executes mutable remote content with the agent process's local permissions, without prior inspection or independent integrity verification. HTTPS protects transport but does not prevent a compromised publisher or distribution endpoint from serving malicious code; the PowerShell alternative has the same weakness. The installation is conditional and uses the vendor's stated domain, which supports a legitimate purpose but does not eliminate supply-chain risk.

Content

Scanner excerpt · SKILL.md (reported line 60)May include surrounding context.

The setup workflow instructs the agent to execute remote installation scripts without warning the user about local system changes.

Medium
Category
Output Handling
Confidence
93% confidence
Finding

The fallback directs the agent to install software without first disclosing local changes or obtaining approval, expanding a Kintone read request into local code execution. Restricting setup to a missing-command error reduces exposure but does not establish user authorization to modify the environment; the declared Bash restriction may limit execution if enforced but is not a substitute for 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 81)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