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Security audit

Devin

Security checks for vulnerabilities and agentic risk

Overview

The Devin integration fits its stated purpose, but automatic setup executes unverified remote code and leaves broader changes to agent skills undisclosed.

Review setup before installing. Use a reviewed, pinned CLI installation and check or disable its automatic skill synchronization. OOMOL will mediate Devin requests and credentials; retain confirmation for creating, resuming, or terminating sessions. The installer and hosted connector implementations are outside the bundled artifact and remain 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 supplied command installs software from an Oomol endpoint and contains no Devin operations or evidence that this installation supports Devin functionality. Its apparent primary purpose and accessed resource materially differ from the declared Devin data-management purpose. The remote script's contents are not supplied, so its further behavior cannot be assessed.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command pipes a mutable remote script directly into Bash without verifying its contents or integrity; the PowerShell alternative has the same weakness. HTTPS protects transport but does not protect against a compromised distribution endpoint or malicious installer update, which could lead to arbitrary code execution under the current user's privileges.

Content

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

The setup workflow instructs the agent to execute a remotely downloaded installer without warning the user about running third-party code and modifying the local system.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

When the CLI is missing, the setup instructions direct the agent to execute third-party installation code without first obtaining informed approval for local system changes. This goes beyond a Devin data operation and could execute malicious or compromised installer code with the agent process's permissions, although the conditional setup path limits exposure.

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