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Security audit

Teamtailor

Security checks for vulnerabilities and agentic risk

Overview

The Teamtailor reads are appropriately scoped, but setup can execute downloaded code and introduce other agent skills without explaining or seeking approval for those changes.

Review and approve CLI installation separately before allowing setup to proceed. Verify the installer and chosen release, and decide whether to permit its additional agent skills. Vendor documentation provides OO_SKILLS_SYNC_DISABLED=1 to disable startup skill synchronization. Connect Teamtailor with only the permissions needed and understand that OOMOL mediates these requests. Exact installer behavior could not be verified; no malicious payload was identified in the supplied skill.

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
99% confidence
Finding

The supplied command runs an external installation script, while the description declares Teamtailor data access. Nothing in the supplied code establishes that this installer supports the declared functionality. The remote script's contents and resulting system changes 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

The command pipes a remotely fetched script directly into bash without version pinning or integrity verification; the PowerShell alternative uses the same fetch-and-execute pattern. Compromise of the distribution endpoint could therefore execute attacker-controlled code with the user's privileges, although the vendor-related domain and missing-CLI prerequisite provide no evidence of malicious intent.

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

The setup workflow executes downloaded installation scripts without warning about remote code execution or system changes.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The fallback setup instructs the agent to execute downloaded shell or PowerShell code without first explaining the system changes or obtaining explicit installation approval. Triggering installation only when the CLI is missing reduces exposure, but a read-oriented Teamtailor request can still lead to arbitrary code execution with the invoking user's privileges.

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 79)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