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Security audit

OpenFootball World Cup

Security checks for vulnerabilities and agentic risk

Overview

The football-data actions fit the stated purpose, but setup directs the agent to execute downloaded installers without integrity checks or clear user approval.

Review and approve CLI installation separately before allowing setup to proceed. Prefer a verified, fixed release and check whether it installs or updates other agent skills. OOMOL sign-in and possible charges are disclosed dependencies. The remote installers and hosted connector implementation were not verified; no malicious behavior is established by the bundled artifact.

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 (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied command performs remote installer execution, not OpenFootball World Cup data retrieval. Nothing in the supplied chunk establishes this installation as a supporting dependency for the declared functionality. The downloaded script's further actions are not visible and cannot be assessed.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
90% confidence
Finding

The supplied code only invokes authentication; it contains no World Cup search or read operation and establishes no connection to the declared data source. Authentication can be a supporting implementation detail, but here it is the entirety of the supplied behavior rather than support for an implemented data-access operation.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a live download directly into Bash executes whatever the installation endpoint returns with the invoking user's privileges, without version pinning or independent integrity verification. HTTPS protects transport but not a compromised publisher or distribution endpoint; exploitation could expose accessible credentials and modify local files, far beyond the skill's read-only purpose.

Content

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

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

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The fallback instructs an agent performing a read-only data task to execute a remote installer without a separate warning or explicit approval for local code execution and system changes. Its missing-command trigger limits exposure, but does not establish user consent for installation; actual execution also depends on the runtime's tool permissions.

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 75)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