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Security audit

Mobile Text Alerts

Security checks for vulnerabilities and agentic risk

Overview

The subscriber-management workflow is clearly scoped, but its fallback setup executes an unverified remote installer without a separate approval step.

Review setup before enabling this skill. Install a verified CLI release deliberately, check its automatic agent-skill synchronization settings, and retain approval requirements for subscriber changes and deletions. OOMOL mediates account access. The remote installer contents remain unverified.

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
98% confidence
Finding

The supplied code contains only remote installer execution and no Mobile Text Alerts operations. Nothing supplied establishes the Oomol installer as a necessary supporting dependency, so its execution is an undeclared capability involving an inconsistent external resource. The downloaded script's further behavior cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a mutable remote installation script directly into Bash executes its contents without version pinning or integrity verification. HTTPS protects transport but does not protect against compromise of the distribution endpoint or a malicious script update, which could execute arbitrary code with the agent's local permissions; the PowerShell example has the same underlying risk.

Content

Scanner excerpt · SKILL.md (reported line 59)May include surrounding context.

Fallback setup instructs the agent to execute downloaded installation scripts without warning the user about remote code execution or system changes.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The fallback directs the agent to install software by executing remotely downloaded scripts without first obtaining explicit approval for local code execution and system changes. Limiting this to a missing-CLI error reduces exposure, but approval to manage Mobile Text Alerts data does not inherently authorize local software installation; execution would have the agent process's permissions.

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 80)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