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Security audit

Zenscrape

Security checks for vulnerabilities and agentic risk

Overview

The skill’s web-fetching function is coherent, but automatic installer execution and undisclosed changes to other agents’ skills warrant review.

Review and explicitly approve CLI installation before use, using a verified release rather than automatically executing a downloaded installer. Review or disable its documented startup skill synchronization before the first command. OOMOL mediates requests and credentials, so consider what URLs and headers you submit. The external installers remain unverified; the reviewed artifact does not establish malicious behavior.

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 (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied command performs remote script execution, not Zenscrape searching or data reading. No connection is established between the Oomol installer and the declared functionality, so this is not a demonstrated supporting implementation detail. The downloaded script's contents and subsequent effects are not available for assessment.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
90% confidence
Finding

The supplied chunk performs only a login operation, not Zenscrape searching or data retrieval. Authentication could be a supporting implementation detail if tied to Zenscrape, but the supplied content establishes no such relationship. As shown, its behavior does not match the declared purpose.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
99% confidence
Finding

The curl-to-bash pipeline executes the current contents of a remote endpoint without pinning, signature verification, or an opportunity to inspect the complete script first. HTTPS protects transport but does not protect against a compromised distribution server or malicious installer update, either of which could lead to arbitrary code execution under the agent's account. This is the same installation risk underlying the SQP-2 finding, not a separate exploit chain.

Content

Scanner excerpt · SKILL.md (reported line 55)May include surrounding context.

The fallback setup instructs the agent to execute downloaded installation scripts without warning the user about remote code execution or system changes.

Medium
Category
Output Handling
Confidence
97% confidence
Finding

When the CLI is missing, the fallback directs the agent to execute a remotely downloaded installer without an explicit user-approval or integrity-verification step. This crosses from reading Zenscrape data into executing code and modifying the local environment; a compromised installer could run with the agent's operating-system privileges. The conditional trigger limits exposure but does not remove the risk.

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 76)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