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Security audit

BaseLinker

Security checks for vulnerabilities and agentic risk

Overview

The BaseLinker reads fit the skill’s purpose, but its automatic setup instructions execute unverified remote code without clearly separating installation approval.

Review and approve the CLI installation separately before enabling this skill’s setup fallback. Consider disabling its documented cross-agent skill synchronization if unwanted, and connect only the intended BaseLinker account through OOMOL. The package contains only instructions; the remote installers and hosted connector implementation were not verified. No artifact-backed malicious intent was found.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • 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
Findings (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
97% confidence
Finding

The supplied command installs remote software rather than searching or reading BaseLinker data. No BaseLinker operations or evidence that this installation is a necessary supporting dependency are present. 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 a remotely fetched script directly into bash executes mutable network-delivered code with the agent process's local privileges, without prior inspection or independent integrity verification. A compromised distribution endpoint could therefore cause credential theft or local tampering; the PowerShell fallback has the same issue, although setup is conditional and the declared tool allowlist may block these commands if enforced.

Content

Scanner excerpt · SKILL.md (reported line 60)May include surrounding context.

Fallback setup instructs execution of remote installation scripts without warning about the system impact.

Medium
Category
Output Handling
Confidence
93% confidence
Finding

The fallback directs an agent to install software by executing downloaded scripts without first explaining the local system changes or obtaining installation approval. Restricting setup to a missing-CLI error reduces exposure, but a request to read BaseLinker data does not itself authorize local software installation.

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 81)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

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 86)May include surrounding context.

md
## Resources

- BaseLinker homepage: https://baselinker.com
- API documentation: https://api.baselinker.com/