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Security audit

Todoist v1 API Reference

Security checks for vulnerabilities and agentic risk

Overview

This is a straightforward Todoist helper skill that uses a user-provided Todoist token to list and change Todoist items, with no hidden code or persistence found.

Install only if you intend to let the agent use your Todoist personal API token. Review mutating commands before execution, especially task deletion, and prefer completing tasks unless you are sure deletion is intended.

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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (16)

External Script Fetching

High
Category
Supply Chain
Content
### List tasks

```bash
curl -s "https://api.todoist.com/api/v1/tasks" \
  -H "Authorization: Bearer $TODOIST_TOKEN" | python3 -m json.tool
```
Confidence
90% confidence
Finding
Remote code is downloaded and executed. This bypasses code review and could introduce malicious code.

External Transmission

Medium
Category
Data Exfiltration
Content
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
# Todoist

API v1 at `https://api.todoist.com/api/v1/`. Auth via Bearer token.

## Auth
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
Filter by project:
```bash
curl -s "https://api.todoist.com/api/v1/tasks?project_id=PROJECT_ID" \
  -H "Authorization: Bearer $TODOIST_TOKEN"
```
Confidence
60% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Missing User Warnings

Medium
Confidence
91% confidence
Finding
The skill documents a permanent delete operation for tasks without any warning, confirmation guidance, or recommendation to prefer safer alternatives at the point of use. This increases the chance of accidental destructive actions and data loss, especially in an agent-driven workflow where commands may be executed on a user's behalf.

Static analysis

No suspicious patterns detected.