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Security audit

Better Stack

Security checks for vulnerabilities and agentic risk

Overview

Better Stack changes require approval, but setup executes an unverified remote installer and the required CLI can install additional agent skills.

Review installation before enabling this skill. Prefer a verified CLI release, restrict its startup skill synchronization, and connect only the Better Stack account and permissions needed. OOMOL mediates account access. The installer contents and deployed connector were not verified; the documented CLI synchronization control is OO_SKILLS_SYNC_DISABLED ([publisher documentation](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md)).

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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (3)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied code installs software from an Oomol domain rather than performing the declared Better Stack operations. Nothing in the chunk establishes this installation as a supporting dependency for Better Stack. The remote script's contents are not supplied, so its further behavior cannot be determined.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup command streams a remotely retrieved, unpinned script directly into Bash, allowing its contents to execute with the agent process's privileges without prior verification. Although installing a required CLI is legitimate and this path only runs when the CLI is missing, compromise of the installer distribution infrastructure could expose local secrets or modify the host; the PowerShell alternative presents the same risk.

Content

Scanner excerpt · SKILL.md (reported line 61)May include surrounding context.

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 82)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