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Security audit

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Security checks for vulnerabilities and agentic risk

Overview

The skill matches its shop-search purpose, but it stores login tokens in multiple local locations and can be pointed at arbitrary API origins, so it should be reviewed before installation.

Install only if you are comfortable authenticating to GeekBI and having local bearer-token state written on disk. Keep the API origin fixed to the intended HTTPS GeekBI endpoint, do not let untrusted prompts supply --base-url, and clear the .geekbi/auth state when it is no longer needed.

Vulnerability Patterns
  • Insecure Skill Coding PracticesFinds exploitable flaws such as hardcoded secrets or command injection
  • 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
Findings (2)

T09 · Insecure Skill Coding Practices

Error
Location
scripts/mercadolibre_mall_search.py:49
Finding

Unrestricted API Origin Enables Server-Side Request Forgery and Untrusted Authentication Flows

Content
View full analysis
Remediation
View remediation

T09 · Insecure Skill Coding Practices

Warning
Location
scripts/geekbi_auth.py:56
Finding

Bearer Tokens and Device Authentication State Are Replicated Across Multiple Local Directories

Content
View full analysis
Remediation
View remediation
Vulnerability Patterns
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (15)

Tp4

High
Category
MCP Tool Poisoning
Confidence
96% confidence
Finding

The declared purpose is store search/analysis, but the behavior reportedly includes login-state persistence, token lifecycle management, filesystem locking, and authenticated HTTP wrappers. This mismatch is dangerous because it can conceal credential-handling and local state manipulation behind an innocuous analytics description, making reviewers and users less likely to apply appropriate scrutiny.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
94% confidence
Finding

The declared purpose is store search/analysis, but the behavior reportedly includes login-state persistence, token lifecycle management, filesystem locking, and authenticated HTTP wrappers. This mismatch is dangerous because it can conceal credential-handling and local state manipulation behind an innocuous analytics description, making reviewers and users less likely to apply appropriate scrutiny.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The declared purpose is store search/analysis, but the behavior reportedly includes login-state persistence, token lifecycle management, filesystem locking, and authenticated HTTP wrappers. This mismatch is dangerous because it can conceal credential-handling and local state manipulation behind an innocuous analytics description, making reviewers and users less likely to apply appropriate scrutiny.

Content

No source excerpt is available for this finding.

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
72% confidence
Finding

The skill declares no explicit tool scope while analysis indicates capabilities such as file read, network, and shell. When a skill can invoke powerful tools without clear least-privilege boundaries, downstream agents may over-trust it and permit broader execution than intended, increasing the chance of data exposure or command misuse.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
92% confidence
Finding

The display name, short description, and default prompt are written entirely in Chinese, which indicates the skill is oriented to a single language without any visible opt-in or explanation that it is region- or language-specific. Under the policy, forcing a specific language without user choice is a natural-language policy concern.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The instruction '原样使用服务端中文 msg' requires responses to be shown in Chinese exactly as returned by the server. This enforces a specific language without user opt-in or any documented locale justification, which matches the language/locale policy violation criteria.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The module docstring and subsequent user-facing strings are written exclusively in Chinese, and the CLI description/help text also assumes Chinese output. Under the policy, forcing a specific language without user opt-in is a natural-language policy violation unless the locale restriction is explicitly justified, which is not present in this file.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Medium
Category
Not specified by scanner
Confidence
89% confidence
Finding

The manifest describes a skill for querying and analyzing Mercado Libre shop data based on GeekBI-returned data, which implies data retrieval logic, not local credential/session management. This file creates multiple persistent storage locations for login state and later stores access tokens and pending login challenges, adding account-session management behavior that is not disclosed in the skill description.

Content

No source excerpt is available for this finding.

Intent-Code Divergence

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The user-config auth path is hardcoded under "temu-research-skill" even though this skill is for Mercado Libre shop search. That mismatch can cause unintended credential/state sharing or collision across unrelated skills, potentially letting one skill read or overwrite another skill's login state and confusing identity boundaries.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

This Python file contains natural-language strings exclusively in Chinese, including the module docstring and multiple error messages returned to users. Under the policy, forcing a specific language without user opt-in or a documented locale-specific justification is a natural-language policy violation.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
91% confidence
Finding

The module docstring and all user-facing CLI/help/error strings in this file are written in Chinese, which effectively constrains interaction to a specific language without any opt-in or alternative locale. The policy allows locale constraints only when choice is offered or the restriction is clearly documented and justified.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
84% confidence
Finding

The skill description is entirely in Chinese and does not state that the skill is intended specifically for Chinese-speaking users or offer any language choice. Under the policy rule for natural-language violations, forcing a specific language without user opt-in can be a locale/language policy issue.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Low
Category
Not specified by scanner
Confidence
84% confidence
Finding

The manifest presents a shop search and analytics capability, but this file also implements storage introspection and deletion functions for authentication state, plus CLI commands to invoke them. Those operational capabilities are outside the user-facing description of searching and filtering Mercado Libre shops.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
95% confidence
Finding

This Python file contains natural-language strings such as the module docstring and argparse description only in Chinese, which enforces a specific language for users. The policy allows locale constraints only when documented and justified or when users are offered a choice, neither of which is present here.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
84% confidence
Finding

This script makes an authenticated HTTP request to a remote Mercado Libre endpoint using the user-provided base URL and then processes a user-supplied country/site query, but the file contains no confirmation prompt or user-facing disclosure about contacting an external service. For code files, outbound network transmission of user or system data should have some visible warning unless the operation is clearly disclosed elsewhere in the skill description.

Content

No source excerpt is available for this finding.