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Security audit

Tmp.Z6S6o6j6SG

Security checks for vulnerabilities and agentic risk

Overview

This Evite integration is disclosed and purpose-aligned, but it needs review because setup runs an unpinned npm MCP server with Evite passwords or browser session cookies and can modify events, guests, and messages.

Install only if you are comfortable giving this MCP server access to your Evite account. Prefer a pinned, reviewed package version; avoid putting passwords or raw cookies in project files; disable Fetchproxy unless you explicitly need it; use a unique Evite password; and carefully confirm any write action such as messaging guests, editing events, sending invitations, or canceling events.

A.I.G

Vulnerability Patterns
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
  • Insecure DependenciesIntroduces malicious components through unsafe dependency sources
  • 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
Findings (3)

T08 · Insecure Dependencies

Error
Location
SKILL.md:17
Finding

Unpinned Third-Party Package Is Downloaded and Executed Automatically

Content
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Remediation
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`. - Remove `-y` so installation or package changes are not accepted silently. - Use a lockfile and verify npm integrity metadata or a separately published cryptographic checksum. - Verify that the npm artifact corresponds to the reviewed source and build process. - Prefer a locally installed, reviewed dependency over runtime package retrieval. - Run the MCP server in a sandbox with restricted filesystem and network access. - Configure the process with only the secrets and permissions required for its documented Evite operations. - Establish an update-review process before changing the pinned package version. ]]>

T09 · Insecure Skill Coding Practices

Error
Location
SKILL.md:17
Finding

Reusable Evite Password Is Stored in Plaintext MCP Configuration

Content
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Remediation
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T05 · Unauthorized Access and Privilege Escalation

Error
Location
SKILL.md:34
Finding

Raw Session Cookies and Browser Cookie Extraction Exceed Least-Privilege Authentication

Content
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Remediation
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SkillSpector

Vulnerability Patterns
  • Rogue AgentSelf-Modification, Session Persistence
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (3)

MCP Config Access

High
Category
Agent Snooping
Confidence
95% confidence
Finding

Skill accesses MCP server configuration files (mcp.json). MCP configs contain server URLs, authentication tokens, and tool definitions — reading them allows the skill to discover and potentially abuse other tool integrations.

Content

Scanner excerpt · SKILL.md (reported line 17)May include surrounding context.

Option A — Claude Code (direct MCP)

Add to .mcp.json in your project or ~/.claude/mcp.json:

json
{

Session Persistence

Medium
Category
Rogue Agent
Confidence
60% confidence
Finding

Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Content

Scanner excerpt · SKILL.md (reported line 3)May include surrounding context.

md
---
name: evite-mcp
description: This skill should be used when the user asks about Evite events or invitations. Triggers on phrases like "check Evite", "my Evite events", "who RSVP'd", "Evite guest list", "RSVP to the party", "message my Evite guests", "create an Evite invite", or any request involving event invitations, guest lists, RSVPs, or party/event hosting on evite.com.
---

# evite-mcp

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The trigger text is broad enough to activate on general invitations, guest lists, RSVPs, or event-hosting requests, not just clearly scoped Evite actions. Over-broad routing can cause the agent to invoke a third-party skill in contexts where the user did not intend Evite access, increasing the chance of unnecessary account access or unintended actions.

Content

No source excerpt is available for this finding.