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Security audit

Calendly Automation

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed Calendly automation guide that uses Rube MCP and Calendly OAuth for expected calendar and organization workflows.

Before installing, make sure you trust Rube MCP/Composio with Calendly OAuth access and only authorize the Calendly scopes you need. Use extra care with cancellation and organization-management actions because they can affect invitees or account membership.

A.I.G

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

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (5)

External Transmission

Medium
Category
Data Exfiltration
Content
3. `CALENDLY_GET_EVENT` - Get detailed info for a specific event by UUID [Optional]

**Key parameters**:
- `user`: Full Calendly API URI (e.g., `https://api.calendly.com/users/{uuid}`) - NOT `"me"`
- `organization`: Full organization URI for org-scoped queries
- `status`: `"active"` or `"canceled"`
- `min_start_time` / `max_start_time`: UTC timestamps (e.g., `2024-01-01T00:00:00.000000Z`)
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
3. `CALENDLY_GET_EVENT` - Get detailed info for a specific event by UUID [Optional]

**Key parameters**:
- `user`: Full Calendly API URI (e.g., `https://api.calendly.com/users/{uuid}`) - NOT `"me"`
- `organization`: Full organization URI for org-scoped queries
- `status`: `"active"` or `"canceled"`
- `min_start_time` / `max_start_time`: UTC timestamps (e.g., `2024-01-01T00:00:00.000000Z`)
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
3. `CALENDLY_GET_EVENT` - Get detailed info for a specific event by UUID [Optional]

**Key parameters**:
- `user`: Full Calendly API URI (e.g., `https://api.calendly.com/users/{uuid}`) - NOT `"me"`
- `organization`: Full organization URI for org-scoped queries
- `status`: `"active"` or `"canceled"`
- `min_start_time` / `max_start_time`: UTC timestamps (e.g., `2024-01-01T00:00:00.000000Z`)
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
3. `CALENDLY_GET_EVENT` - Get detailed info for a specific event by UUID [Optional]

**Key parameters**:
- `user`: Full Calendly API URI (e.g., `https://api.calendly.com/users/{uuid}`) - NOT `"me"`
- `organization`: Full organization URI for org-scoped queries
- `status`: `"active"` or `"canceled"`
- `min_start_time` / `max_start_time`: UTC timestamps (e.g., `2024-01-01T00:00:00.000000Z`)
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
3. `CALENDLY_GET_EVENT` - Get detailed info for a specific event by UUID [Optional]

**Key parameters**:
- `user`: Full Calendly API URI (e.g., `https://api.calendly.com/users/{uuid}`) - NOT `"me"`
- `organization`: Full organization URI for org-scoped queries
- `status`: `"active"` or `"canceled"`
- `min_start_time` / `max_start_time`: UTC timestamps (e.g., `2024-01-01T00:00:00.000000Z`)
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Static analysis

No suspicious patterns detected.