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Security audit

Bitrise

Security checks for vulnerabilities and agentic risk

Overview

The Bitrise actions have clear safeguards, but setup can execute unverified remote installers without separate user approval.

Review setup before enabling this skill. Install a verified CLI version yourself and review or disable its automatic skill synchronization. Connecting Bitrise authorizes OOMOL to mediate account operations, and triggering builds may consume resources. Keep the skill's write-confirmation requirement. The bundled instructions were fully inspected, but downloaded installer behavior remains unverified.

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
99% confidence
Finding

The visible code performs an Oomol installation rather than the declared Bitrise data operations. No evidence in the supplied chunk establishes this installation as a supporting dependency for Bitrise. The downloaded script's additional behavior cannot be determined from this command alone.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping an HTTPS response directly into bash executes mutable remote content without pinning, integrity verification, or review. A compromised distribution endpoint could therefore run arbitrary commands with the agent process's access, potentially exposing local credentials and modifying files; the legitimate CLI setup context does not remove this supply-chain risk.

Content

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

The setup workflow instructs the agent to execute downloaded installation scripts without warning the user about remote code execution or system changes.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The setup instructions direct execution of downloaded shell and PowerShell scripts without an explicit approval gate or explanation of host changes. Although installation is a legitimate prerequisite and only occurs when the CLI is missing, it crosses from Bitrise operations into arbitrary code execution with the agent process's privileges.

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