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Security audit

AccuWeather

Security checks for vulnerabilities and agentic risk

Overview

The weather features fit their purpose, but setup can execute changing remote code and introduce other agent skills without clearly explaining those effects.

Review and install a verified CLI release yourself before use, rather than allowing automatic remote-script execution. Consider setting OO_SKILLS_SYNC_DISABLED=1 to prevent startup writes to other agents' skill directories, as documented in the [CLI reference](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md#environment-variables). OOMOL mediates your weather requests and connected credentials. The remote installer and hosted connector implementation were not inspected.

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
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied command executes a remote installer unrelated to the declared AccuWeather functionality. Nothing in the chunk accesses AccuWeather or retrieves weather data, and no connection is established that would justify this installation as a supporting implementation detail. The downloaded script's further behavior is not visible.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
87% confidence
Finding

The supplied chunk performs only a login operation, not AccuWeather searching or reading. Authentication could be a supporting implementation detail, but the provided code establishes no connection between this login and the declared AccuWeather functionality.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The installation command pipes a remotely retrieved, unpinned script directly into Bash without verifying its integrity or reviewing its contents; the PowerShell alternative has the same weakness. Compromise of the distribution endpoint or script could execute arbitrary code with the invoking user's privileges, exposing local files and credentials. The missing-CLI prerequisite reduces exposure frequency but does not constrain what the downloaded code can do.

Content

Scanner excerpt · SKILL.md (reported line 59)May include surrounding context.

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 80)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