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Security audit

AfterShip

Security checks for vulnerabilities and agentic risk

Overview

The AfterShip workflow requires approval for data changes, but its setup directs the agent to run unverified remote code without separate approval.

Review and install a trusted CLI release yourself before use, and require separate approval for installer execution. Review its automatic skill synchronization and disable it if unwanted. Using this integration requires trusting OOMOL with connected-account access; retain the stated approval checks for tracking changes and deletion. The external installer and service implementation were not verified.

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
  • 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
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
96% confidence
Finding

The visible behavior is execution of an Oomol CLI installer, with no demonstrated connection to AfterShip functionality. Although dependency installation can be a supporting implementation detail, the supplied content establishes no such relationship. The downloaded script is not provided, so its specific effects cannot be determined.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping an unpinned remote response directly into bash executes whatever the installer endpoint supplies with the invoking user's privileges; the PowerShell alternative has the same risk. Compromise of the distribution endpoint or installer could lead to local data theft or modification, although the file provides no evidence that the endpoint is currently malicious.

Content

Scanner excerpt · SKILL.md (reported line 63)May include surrounding context.

The setup workflow executes downloaded installation scripts without warning the user about running remote code.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The fallback setup directs execution of downloaded shell or PowerShell code without explaining the local execution risk or requiring approval for software installation. The missing-CLI condition limits exposure, but permission to perform AfterShip operations does not necessarily authorize executing an installer on the user's machine.

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 84)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