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Security audit

Sensibo

Security checks for vulnerabilities and agentic risk

Overview

Sensibo actions have appropriate confirmation rules, but setup executes an unverified downloaded installer and omits broader changes the CLI makes to agent skills.

Review and approve CLI installation separately, including its automatic changes to other agents' skills. Disable skill synchronization if unwanted, and retain confirmation before AC changes. OOMOL brokers the Sensibo connection. The downloaded installers remain unverified; this review found no artifact-backed evidence of malicious intent.

A.I.G

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

SkillSpector

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 declared purpose concerns Sensibo data operations, while the supplied code executes an installer from a different service. Nothing in the chunk establishes that this installation supports Sensibo functionality, so it represents an undeclared capability rather than a demonstrated supporting implementation detail. The downloaded script's further behavior 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

The curl-to-bash pipeline immediately executes whatever script the remote endpoint returns, without version pinning or independent integrity verification. HTTPS protects transport but not against a compromised publisher or distribution system, so this legitimate CLI setup step can become arbitrary local code execution; this overlaps with SQP-2 rather than representing a separate attack path.

Content

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

Fallback setup executes remotely downloaded installation scripts without a system-integrity warning.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The fallback directs the agent to execute a remotely supplied shell or PowerShell script without reviewing or verifying its contents or obtaining explicit installation approval. A compromised distribution endpoint could execute arbitrary commands with the invoking user's privileges; limiting installation to a missing-CLI error reduces exposure but does not establish script integrity.

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