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Security audit

Tonghuashun Financial Data

Security checks for vulnerabilities and agentic risk

Overview

This financial-data skill needs review because setup executes unverified remote code and export uploads bypass its stated confirmation rules.

Review and approve the CLI installation separately, including its automatic skill synchronization. Require confirmation before export uploads and clarify their storage destination and retention. Ordinary queries fit the advertised purpose; the bundled text does not establish malicious intent, but external installer and connector implementations 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
  • 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
97% confidence
Finding

The supplied chunk performs remote script execution rather than financial-data searching or reading. Although installing a CLI could be a supporting setup step, the supplied content establishes no connection between this installer and the declared service. The downloaded script's contents and any further effects are not visible.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a mutable remote script directly into bash executes its contents without a separate review or artifact-verification step. HTTPS protects transport but does not prevent a compromised publisher or distribution endpoint from supplying malicious code; this is the same installation risk identified by SQP-2, not an independent exploit.

Content

Scanner excerpt · SKILL.md (reported line 113)May include surrounding context.

Untagged export actions upload data despite the safety claim that untagged actions are reads.

Medium
Category
Excessive Agency
Confidence
94% confidence
Finding

The export actions explicitly upload datasets to transit storage but lack the write tags that trigger user confirmation. This contradicts the blanket assurance that untagged actions are reads and could cause storage creation or external transfer without informed approval, although the described datasets are market data rather than private account records.

Content

No source excerpt is available for this finding.

The setup workflow executes downloaded installation scripts without warning about the system-integrity implications.

Medium
Category
Output Handling
Confidence
95% confidence
Finding

The missing-CLI fallback instructs the agent to execute remotely supplied shell or PowerShell code without explicit installation approval or integrity verification. If executed and the distribution channel is compromised, that code could modify the host or access files and credentials with the invoking user's privileges; the setup-only condition limits exposure but does not remove it.

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 134)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