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Security audit

Pushbullet

Security checks for vulnerabilities and agentic risk

Overview

The Pushbullet workflow has sensible safeguards, but setup directs downloaded code execution without a clear approval step.

Review and approve CLI installation separately, using a verified release. Check its automatic skill synchronization before first use; the [CLI reference](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md) documents OO_SKILLS_SYNC_DISABLED. OOMOL brokers access to your Pushbullet account, so connect only an account you intend to expose and retain the skill's confirmations for sending, changing, and deleting data.

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 chunk performs no visible Pushbullet operations and instead executes an installer from a different service. Nothing supplied establishes that this is a supporting dependency for the declared purpose. The remote script's contents and downstream behavior are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
97% confidence
Finding

Piping an HTTPS response directly into bash executes mutable remote code without checking a pinned version, signature, or independently trusted digest. Compromise of the installation endpoint or its publishing pipeline could therefore lead to arbitrary code execution and access to local data available to the agent. The endpoint is relevant to the required CLI and uses HTTPS, which reduces suspicion but does not establish script integrity.

Content

Scanner excerpt · SKILL.md (reported line 68)May include surrounding context.

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

Medium
Category
Output Handling
Confidence
92% confidence
Finding

The missing-CLI fallback directs installation through immediately executed remote scripts without requiring disclosure of local changes or explicit installation approval. A request to manage Pushbullet data does not necessarily authorize installing software, and these scripts can execute with the agent process's local permissions. The conditional fallback limits exposure, but the confirmation rules for Pushbullet writes do not cover local installation.

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 89)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