Security audit

Agent Outlier

Security checks for vulnerabilities and agentic risk

Overview

This skill is for an on-chain paid game and is mostly disclosed, but it gives broad wallet-signing authority to unpinned code and includes an unbounded paid play loop.

Install only if you understand this can spend real ETH on Base mainnet. Use a dedicated low-balance wallet, pin and audit dependency versions, avoid the continuous play loop, and require explicit confirmation and spending limits before any commit, reveal, finalize, claim, or playRound action.

A.I.G

Vulnerability Patterns

Insecure DependenciesIntroduces malicious components through unsafe dependency sources
Insecure Skill Coding PracticesFinds exploitable flaws such as hardcoded secrets or command injection
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

Findings (2)

T08 · Insecure Dependencies

Error

Location: SKILL.md:42
Finding: Unpinned Third-Party SDK Receives Access to a Mainnet Wallet Signer
Content: View full analysis
Remediation: View remediation

T09 · Insecure Skill Coding Practices

Error

Location: SKILL.md:174
Finding: Unbounded Autonomous Loop Can Repeatedly Spend Mainnet Funds
Content: View full analysis
setTimeout(r, 30000)); // wait 30s on error } } } playForever(player); ``` ### Technical Analysis The example continuously invokes `player.playRound` inside an unconditional `while (true)` loop. Each successful round can perform multiple Base mainnet transactions and incur both a non-refundable entry fee and gas costs. There is no maximum round count, cumulative-spend limit, gas-price ceiling, wallet-balance reserve, execution deadline, cancellation signal, or per-round user confirmation. Exceptions only introduce a 30-second delay before retrying, so persistent errors or unexpected SDK behavior do not safely terminate execution. Because the Skill explicitly states that entry fees are non-refundable after commitment, this pattern creates direct and potentially continuing financial exposure. ### Attack Path 1. A user configures a funded Base mainnet wallet and starts the documented `playForever` example. 2. The loop invokes `player.playRound(TIER.NANO, picks)` without requesting further approval. 3. Each iteration signs and submits paid commit, reveal, finalize, and potentially claim transactions. 4. After a completed round, the loop immediately begins another round. 5. If an error occurs, execution waits for 30 seconds and retries rather than st ...[truncated 901 chars]
Remediation: View remediation

SkillSpector

Vulnerability Patterns

Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code

Findings (2)

Vague Triggers

Medium

Category: Not specified by scanner
Confidence: 95% confidence
Finding: The skill description uses broad trigger phrases such as 'outlier', 'arena', 'commit', 'reveal', and 'finalize', which can match ordinary crypto, gaming, or governance conversations that are not requests to use this specific skill. Because this skill can sign paid on-chain transactions using a configured private key, accidental invocation increases the chance of unintended wallet actions and financial loss.
Content: No source excerpt is available for this finding.

Missing User Warnings

Medium

Category: Not specified by scanner
Confidence: 97% confidence
Finding: The continuous-play example implements an infinite loop that repeatedly calls a paid transaction flow (playRound) without a prominent warning, budget cap, stop condition, or human confirmation. In this skill's context, each iteration can spend ETH entry fees and gas on Base mainnet, so users may unknowingly authorize unbounded financial loss if the pattern is copied or automated by an agent.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.