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Security audit

Notion

Security checks for vulnerabilities and agentic risk

Overview

The Notion features are clearly described, but setup can execute changing remote software without asking for installation approval.

Review CLI setup separately before allowing it to run. Prefer a verified fixed release and check whether automatic installation of other agent skills is enabled. Limit the Notion connection to needed content and retain the required confirmations for changes. The supplied instructions show a setup-control concern, but no evidence of malicious intent; downloaded software and hosted behavior remain unverified.

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
96% confidence
Finding

The supplied command executes an Oomol installer rather than performing a Notion operation. Although installation can be a supporting implementation detail, the supplied content establishes no connection between this installer and the declared Notion functionality. The downloaded script is not provided, so its further behavior cannot be determined.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
97% confidence
Finding

Piping a live installer directly into Bash executes remotely supplied code with the agent process's local privileges, without a pinned version or independent integrity verification. A compromised distribution endpoint could therefore compromise local files and accessible credentials; the legitimate vendor domain and conditional setup reduce suspicion of malicious intent but do not remove this supply-chain risk. The PowerShell installation example has the same underlying issue.

Content

Scanner excerpt · SKILL.md (reported line 84)May include surrounding context.

The setup workflow instructs the agent to execute downloaded installer scripts without warning the user about remote code execution or system changes.

Medium
Category
Output Handling
Confidence
95% confidence
Finding

The fallback instructs the agent to install local software without first explaining the system changes or obtaining approval. Its missing-CLI condition limits exposure, but confirmation requirements elsewhere cover Notion mutations rather than local installation, leaving an authorization gap.

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 105)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