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Security audit

Fiber AI

Security checks for vulnerabilities and agentic risk

Overview

The Fiber AI read operations fit the stated purpose, but setup can execute unverified downloaded software and introduce persistent agent skills without clear user approval.

Review setup before installing. Approve and verify the CLI installation separately, connect only the intended Fiber AI account, and review its automatic agent-skill changes. Upstream documents OO_SKILLS_SYNC_DISABLED as a synchronization opt-out in its [command reference](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md). Remote installer payloads and server-side connector behavior were not verified.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • 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
Findings (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The supplied command installs software from an Oomol endpoint rather than searching or reading Fiber AI data. Nothing in the supplied chunk establishes this installation as a supporting dependency for the declared purpose. The downloaded script's contents and further effects are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
99% confidence
Finding

Piping a remotely fetched script directly into bash executes whatever the endpoint returns without a separate integrity-verification or review step; the PowerShell setup alternative has the same issue. HTTPS protects transport but does not prevent a compromised publisher or distribution endpoint from supplying malicious code capable of accessing local files and credentials.

Content

Scanner excerpt · SKILL.md (reported line 57)May include surrounding context.

The setup workflow executes remote installation scripts without warning about system-level effects.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The missing-CLI recovery path directs the agent to execute downloaded installation code without explaining its effects or requiring explicit installation approval. Although conditional and plausibly legitimate, this expands a read-oriented task into local code execution with the agent process'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 78)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

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 83)May include surrounding context.

md
## Resources

- Fiber AI homepage: https://fiber.ai
- API documentation: https://api.fiber.ai/