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Security audit

Process Street

Security checks for vulnerabilities and agentic risk

Overview

This skill needs review because its setup executes unverified remote code and omits broader changes the CLI can make to installed agent skills.

Review and install the CLI separately before allowing automatic setup. OOMOL will handle the connected account and Process Street requests. Consider disabling startup skill synchronization with OO_SKILLS_SYNC_DISABLED=1, as documented in the [publisher's reference](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md). Retain the required confirmations for writes. This review does not establish the safety of the unavailable remote installer.

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
97% confidence
Finding

The supplied code performs remote script execution rather than any visible Process Street operation. Although dependency installation can be a supporting implementation detail, this chunk provides no evidence that the Oomol installer supports the declared Process Street functionality. The downloaded script's contents and subsequent behavior are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping the HTTPS response directly into bash executes mutable remote code without version pinning, signature verification, or a review step. A compromised installation endpoint or release infrastructure could execute arbitrary commands with the invoking user's privileges; the PowerShell alternative has the same underlying risk.

Content

Scanner excerpt · SKILL.md (reported line 64)May include surrounding context.

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

Medium
Category
Output Handling
Confidence
92% confidence
Finding

The fallback setup directs the agent to execute remotely supplied installation code without requiring explicit approval for local system changes or explaining the execution risk. Limiting setup to a missing CLI reduces exposure, but installing software is a separate trust boundary from operating Process Street and can affect the local machine with the agent's permissions.

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 85)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