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Security audit

Slack

Security checks for vulnerabilities and agentic risk

Overview

Slack actions have clear approval safeguards, but automatic setup can execute unverified remote code and introduce broader persistent agent changes.

Review and verify the CLI installation separately before allowing setup. Check its automatic skill synchronization and explicitly control any changes to other agent hosts. OOMOL will process connected Slack data; grant only needed access and retain the posting and deletion approval safeguards. The remote installers and hosted connector implementation were not inspected.

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
98% confidence
Finding

The supplied chunk contains no Slack interaction or evidence that the Oomol installer supports the declared Slack functionality. Its observable behavior is executing an external installer, a materially different purpose. The downloaded script's contents are not supplied, so its further effects 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 instructions pipe a mutable remote script directly into Bash; the adjacent PowerShell example likewise immediately executes downloaded content. If the distribution endpoint or publishing pipeline is compromised, attacker-controlled code could run with the agent's local privileges and access available files and credentials. The command-not-found prerequisite reduces exposure, but HTTPS and a relevant vendor domain do not establish script integrity.

Content

Scanner excerpt · SKILL.md (reported line 102)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 123)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