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Security audit

Laposta

Security checks for vulnerabilities and agentic risk

Overview

Needs review because its setup instructs the agent to run downloaded software without an explicit approval or integrity check.

Before enabling this skill, install a verified, fixed CLI version yourself or require approval before setup runs downloaded code. Review the CLI's automatic agent-skill synchronization and disable unwanted changes. Confirm that OOMOL may process your Laposta data. The complete bundled artifact was inspected, but remote installers and hosted connector behavior remain unverified; no intentional malicious behavior was established.

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
Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
Findings (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
97% confidence
Finding

The supplied code performs remote installer execution, not Laposta data operations. No code or context establishes this installer as a supporting dependency for Laposta, so its behavior is not adequately represented by the declared purpose. The downloaded script's further effects cannot be determined from the supplied chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
99% confidence
Finding

The command pipes a mutable remote script directly into Bash without pinning or verifying its contents; the PowerShell fallback has the same execution pattern. Compromise of the installer delivery path could execute attacker-controlled code with the agent process's permissions, potentially exposing local files and credentials. The installer is relevant to the connector, but that relevance does not provide code-integrity assurance.

Content

Scanner excerpt · SKILL.md (reported line 62)May include surrounding context.

Fallback setup executes downloaded installation scripts without a user warning or approval step.

Medium
Category
Output Handling
Confidence
97% confidence
Finding

When the CLI is missing, the skill directs the agent to install software by executing a downloaded script without an explicit approval step. This expands a Laposta data request into local code execution and environment modification; the conditional fallback limits exposure but does not establish user authorization.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 83)May include surrounding context.

md
- **`OOMOL_INSUFFICIENT_CREDIT`** — OOMOL billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

- **HTTP 402 without `OOMOL_INSUFFICIENT_CREDIT`** — the third-party account itself has no active plan or credit. Report the provider error message as is; do not ask the user to recharge OOMOL.

## Resources

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 88)May include surrounding context.

md
## Resources

- Laposta homepage: https://laposta.nl/
- API documentation: https://api.laposta.nl/doc/