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Security audit

Todoist Api Rest

Security checks for vulnerabilities and agentic risk

Overview

This is a straightforward Todoist API helper skill whose network and account-changing commands match its stated purpose.

Install only if you are comfortable giving the skill's commands access to your Todoist account through TODOIST_API_TOKEN. Review generated curl commands before running them, especially create and close task operations, and verify task IDs to avoid changing the wrong task.

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 (11)

External Transmission

Medium
Category
Data Exfiltration
Content
### List Active Tasks
```bash
curl -H "Authorization: Bearer $TODOIST_API_TOKEN" https://api.todoist.com/rest/v2/tasks | jq .
```
*Note: If rest/v2 returns 410, use `api/v1/tasks` (see below).*
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
### List Active Tasks
```bash
curl -H "Authorization: Bearer $TODOIST_API_TOKEN" https://api.todoist.com/rest/v2/tasks | jq .
```
*Note: If rest/v2 returns 410, use `api/v1/tasks` (see below).*
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
### List Active Tasks
```bash
curl -H "Authorization: Bearer $TODOIST_API_TOKEN" https://api.todoist.com/rest/v2/tasks | jq .
```
*Note: If rest/v2 returns 410, use `api/v1/tasks` (see below).*
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
### List Active Tasks
```bash
curl -H "Authorization: Bearer $TODOIST_API_TOKEN" https://api.todoist.com/rest/v2/tasks | jq .
```
*Note: If rest/v2 returns 410, use `api/v1/tasks` (see below).*
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
### List Active Tasks
```bash
curl -H "Authorization: Bearer $TODOIST_API_TOKEN" https://api.todoist.com/rest/v2/tasks | jq .
```
*Note: If rest/v2 returns 410, use `api/v1/tasks` (see below).*
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
### List Active Tasks
```bash
curl -H "Authorization: Bearer $TODOIST_API_TOKEN" https://api.todoist.com/rest/v2/tasks | jq .
```
*Note: If rest/v2 returns 410, use `api/v1/tasks` (see below).*
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
### List Active Tasks
```bash
curl -H "Authorization: Bearer $TODOIST_API_TOKEN" https://api.todoist.com/rest/v2/tasks | jq .
```
*Note: If rest/v2 returns 410, use `api/v1/tasks` (see below).*
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
### List Active Tasks
```bash
curl -H "Authorization: Bearer $TODOIST_API_TOKEN" https://api.todoist.com/rest/v2/tasks | jq .
```
*Note: If rest/v2 returns 410, use `api/v1/tasks` (see below).*
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
### Create Task
```bash
curl -X POST -H "Authorization: Bearer $TODOIST_API_TOKEN" \
     -H "Content-Type: application/json" \
     -d '{"content": "New Task", "due_string": "today"}' \
     https://api.todoist.com/rest/v2/tasks
Confidence
60% 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
### Create Task
```bash
curl -X POST -H "Authorization: Bearer $TODOIST_API_TOKEN" \
     -H "Content-Type: application/json" \
     -d '{"content": "New Task", "due_string": "today"}' \
     https://api.todoist.com/rest/v2/tasks
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
94% confidence
Finding
The skill documents a state-changing 'close task' operation that marks user tasks complete, but it does not warn that this mutates account data and may be hard to notice or reverse in automated use. In an agent skill context, undocumented destructive actions increase the risk of accidental data loss or unintended task completion when a model or user invokes examples verbatim.

Static analysis

No suspicious patterns detected.