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Security audit

Zep

Security checks for vulnerabilities and agentic risk

Overview

The Zep workflow is coherent, but its automatic installation fallback executes unverified remote code and leaves broader agent changes undisclosed.

Review the installation fallback before enabling this skill. Install a verified CLI separately and consider disabling its automatic skill synchronization; the upstream command reference documents OO_SKILLS_SYNC_DISABLED. Expect sensitive Zep requests to pass through OOMOL, and retain confirmation for changes and deletions. The bundled artifact was fully inspected, but remote installer and binary behavior remain unverified. No malicious intent was established.

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 (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied command performs remote script installation rather than any demonstrated Zep operation. Nothing in the provided code establishes this installer as a supporting dependency for Zep. The downloaded script's contents are unavailable, so its further effects cannot be determined.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
90% confidence
Finding

The supplied chunk only invokes a login command; it contains no Zep operations or evidence that oo is a Zep client. Authentication could be a supporting implementation detail if that relationship were established, but the supplied content does not establish it.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The installation command executes a mutable remote script directly in Bash without verifying its contents, signature, or a trusted pinned digest; the PowerShell alternative has the same weakness. Compromise of the distribution endpoint or delivery infrastructure could execute arbitrary code with the agent process's privileges, potentially accessing local files and credentials. The missing-CLI condition limits exposure, but no explicit user approval is required for this installation step.

Content

Scanner excerpt · SKILL.md (reported line 66)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 87)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