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Security audit

Zixflow

Security checks for vulnerabilities and agentic risk

Overview

Zixflow changes require your approval, but the required CLI can silently install or refresh other agent skills without that being explained here.

Review the CLI's automatic skill installation before using this integration. Its documentation provides OO_SKILLS_SYNC_DISABLED=1 to prevent startup synchronization; ensure it applies to every invocation if you want that containment. Review the installer separately, limit the connected Zixflow account's permissions, and retain confirmations for changes and deletions. The Review verdict concerns under-disclosed persistent agent changes, not evidence of malicious intent. The exact downloaded installer and deployed connector 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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (3)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The supplied command executes an Oomol-hosted installation script rather than performing Zixflow data operations. No connection is shown between this installer and the declared Zixflow functionality, so it cannot be established as a supporting implementation detail. The downloaded script's contents and any further effects are not supplied.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup instructions pipe a remotely fetched, mutable script directly into Bash without a pinned version or independent integrity verification; the PowerShell alternative has the same execution pattern. Although this is a relevant dependency installation and only runs when the CLI is missing, compromise of the distribution endpoint could execute attacker-controlled code with the invoking user's privileges, exposing local files and credentials.

Content

Scanner excerpt · SKILL.md (reported line 70)May include surrounding context.

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 91)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