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Security audit

Figma

Security checks for vulnerabilities and agentic risk

Overview

Figma operations have clear approval safeguards, but automatic setup can run unverified downloaded code without separate user approval.

Review and install a verified CLI release yourself before enabling this skill. Check its automatic skill synchronization and disable it if unwanted. Connecting Figma authorizes OOMOL to mediate access to your account; keep permissions limited and retain the skill's explicit approval requirements for changes and deletions. The concrete concern is uncontrolled setup and broader agent changes; the artifacts do not establish malicious intent.

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 command runs an Oomol installation script rather than performing any visible Figma operation. Although dependency installation can be a supporting implementation detail, the supplied chunk establishes no relationship between this installer and the declared Figma functionality. The downloaded script's contents are not supplied, so its additional behavior cannot be determined.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command executes a mutable remote script immediately, without a pinned version, signature validation, or independent integrity check. If the distribution endpoint or its delivery pipeline is compromised, attacker-controlled code would run with the invoking account's privileges; HTTPS alone does not protect against compromise of the legitimate source.

Content

Scanner excerpt · SKILL.md (reported line 80)May include surrounding context.

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

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The missing-CLI recovery instructions direct the agent to execute remote shell or PowerShell code without explicit installation approval or disclosure of system changes. Dependency setup is legitimate here, but it crosses from Figma operations into local code execution with the agent's privileges; the missing-command condition limits exposure without making that transition safe.

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 101)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