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Security audit

BigML

Security checks for vulnerabilities and agentic risk

Overview

The BigML workflow is coherent, but setup can execute unverified downloaded software without a clear approval step.

Review dependency setup before use. Prefer a separately verified CLI installation and require approval for installation or changes to other agent skills. OOMOL mediates the BigML connection and requests. Keep the documented confirmations for writes and deletions. The remote installer and hosted connector implementation were not verified; no malicious behavior was established.

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 (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
97% confidence
Finding

The supplied chunk performs no visible BigML operations. Its sole action is to download and execute an Oomol installer, and nothing provided establishes this as a supporting BigML dependency. This is an inconsistent resource and an undeclared installation capability. The remote script's contents and any further effects cannot be determined from the supplied code.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
87% confidence
Finding

The only supplied command initiates authentication and contains no BigML-specific target or operation. Authentication could be a supporting implementation detail, but the supplied chunk provides no connection to BigML and implements none of the declared functionality. This assessment does not imply that the login is malicious.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The curl-to-bash command immediately executes mutable remote content with the invoking user's privileges, without version pinning or independent integrity verification. Compromise of the installer distribution path could enable credential theft or local file modification; HTTPS helps protect transport but does not establish installer integrity, and the PowerShell example has the same underlying risk.

Content

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

The setup workflow executes downloaded installer scripts without warning about remote code execution or local system changes.

Medium
Category
Output Handling
Confidence
95% confidence
Finding

The setup workflow directs the agent to execute downloaded shell or PowerShell code without first explaining local system changes or obtaining installation-specific approval. A missing dependency can therefore turn a BigML request into local code execution; the conditional setup requirement reduces exposure but does not establish informed authorization.

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