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Security audit

Cyberimpact

Security checks for vulnerabilities and agentic risk

Overview

Cyberimpact changes require approval, but missing-tool setup directs the agent to execute an unverified remote installer without a separate approval step.

Review and approve CLI installation separately, preferably using a pinned, verified release. Check its broader agent-skill installation behavior before running it. Connecting Cyberimpact authorizes OOMOL-mediated account access; retain the required confirmations for changes and deletions. The packaged instructions were fully inspected, but external installer and CLI behavior 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
  • 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 code performs remote installer execution rather than any visible Cyberimpact operation. Nothing in the chunk establishes this installer as a supporting dependency for the declared purpose. The downloaded script's contents are not supplied, so its downstream behavior cannot be assessed.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
99% confidence
Finding

Piping an HTTPS response directly into Bash executes mutable remote code without a pinned version or independent integrity verification; the PowerShell alternative has the same weakness. Compromise of the installer host or delivery pipeline could execute arbitrary code with the agent's permissions, exposing accessible files and credentials. The legitimate dependency relationship and conditional setup reduce suspicion of malicious intent but do not remove the supply-chain risk.

Content

Scanner excerpt · SKILL.md (reported line 69)May include surrounding context.

The fallback setup executes downloaded installer scripts without warning about local system changes or remote-code execution.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The fallback directs the agent to execute remote installation scripts without explicit approval for local code execution or disclosure of possible system changes. Restricting this to a missing-CLI error reduces exposure, but a Cyberimpact request does not itself authorize installing software with the agent's local 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 90)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 95)May include surrounding context.

md
## Resources

- Cyberimpact homepage: https://www.cyberimpact.com/
- API documentation: https://api.cyberimpact.com/docs