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Security audit

Dropbox

Security checks for vulnerabilities and agentic risk

Overview

The Dropbox workflow has clear safeguards, but setup directs the agent to execute unverified remote installation code without separate approval.

Review and approve CLI installation separately using a fixed, verified release. Check its agent-skill installation behavior before first use. Connecting Dropbox entrusts OOMOL with account access, and downloads enter transit storage with unspecified retention. Keep the documented approvals for writes and deletions. The external installer and connector internals 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
98% confidence
Finding

The supplied command installs remote software rather than performing any visible Dropbox operation. Although installation can be a supporting implementation detail, the supplied chunk establishes no relationship between this installer and the declared Dropbox functionality. The remote script's contents and any further behavior cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a mutable HTTPS response directly into bash executes remote code without checking a pinned version, signature, or trusted checksum; the PowerShell alternative has the same issue. Although the endpoint belongs to the documented CLI provider, compromise of its distribution infrastructure could yield arbitrary code execution and access to local files or credentials.

Content

Scanner excerpt · SKILL.md (reported line 82)May include surrounding context.

The setup workflow instructs execution of remote installation scripts without a system-integrity warning.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The fallback setup instructs the agent to execute remote shell or PowerShell scripts without first obtaining approval for local installation or explaining its system-level effects. Limiting this to a missing-CLI error reduces exposure, but a routine Dropbox request can still trigger execution of installer-controlled code with the invoking user'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 103)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