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Security audit

BambooHR

Security checks for vulnerabilities and agentic risk

Overview

The BambooHR reads fit the stated purpose, but setup can execute unchecked downloads and introduce broader agent changes without clear user control.

Review and verify the CLI installation separately before allowing setup. Decide whether its additional managed skills are wanted; upstream documents OO_SKILLS_SYNC_DISABLED=1 to suppress startup synchronization. Connect only an appropriately restricted BambooHR account and consider OOMOL's role in handling employee data. The bundled instructions were fully inspected, but remote installer contents and the exact version they would install 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 installs software from an external CLI distribution endpoint rather than performing the declared BambooHR operations. Nothing in the provided chunk establishes that this installation is a supporting dependency for BambooHR access. The downloaded script's contents are unavailable, 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

Piping the HTTPS response directly into bash gives the downloaded script immediate execution without an integrity-verification step. Compromise of the installer host or release pipeline could expose local files, available credentials, and the agent environment. The vendor-related domain and missing-CLI prerequisite make this a plausible setup procedure, not evidence of malicious intent, but do not establish script integrity.

Content

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

First-time setup executes downloaded installation scripts without a system-integrity warning.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

Both setup commands execute downloaded scripts without first verifying a pinned version, signature, or trusted digest. A compromised distribution endpoint could therefore execute arbitrary code with the agent process's permissions; the conditional setup trigger reduces exposure but does not remove the risk. The substantive issue is unverified execution, not merely the absence of a warning.

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