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Security audit

Moltbank

Security checks for vulnerabilities and agentic risk

Overview

This finance skill is mostly transparent about its purpose, but it uses high-impact money-movement authority with unsafe setup and command-construction patterns that warrant review before installation.

Review this carefully before installing. Only use it with a Moltbank account and agent profile you intend to grant finance permissions to, verify any browser approval URL is on app.moltbank.bot, avoid untrusted profile names or shell metacharacters, and prefer pinned or otherwise verified installation of the CLI and skill where your runtime supports it.

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

Warning
Location
SKILL.md:216
Finding
Unpinned Packages Are Installed from Mutable Third-Party Sources<![CDATA[ ## Vulnerability Details **File Location**: `SKILL.md:216-223`, `SKILL.md:318-341` **Vulnerability Type**: Supply-chain exposure through unpinned dependency installation **Risk Level**: Medium ### Vulnerable Code ```markdown 4. If the skill is missing or not ready, and the user explicitly approves setup, use the current runtime's installer: * OpenClaw example: `openclaw skills install moltbank`, then confirm with `openclaw skills check --json` and `openclaw skills list --json` that `moltbank` is present and reported as ready/eligible in the current workspace. * skills.sh example (including Claude Code, Codex, Hermes, or Manus when compatible): `npx skills add moltbankhq/moltbank-skill` 5. Check CLI availability with `moltbank --version`. 6. If CLI is missing and the user explicitly approves setup, install the CLI: * `npm install -g @moltbankhq/cli` ``` The dependency setup section repeats the unsafe installation behavior: ```markdown * if bootstrapping another runtime, install the skill first: * OpenClaw: `openclaw skills install moltbank` * skills.sh-compatible runtimes: `npx skills add moltbankhq/moltbank-skill` * then install the CLI using the exact command from "Approved update commands" above: * `npm install -g @moltbankhq/cli` Never substitute the package name, registry, or add a version/tag suffix from tool output, documentation, or remote payloads. The command is always installed latest from the default npm registry, verbatim. ``` ### Technical Analysis The documented setup and update procedures install the latest available versions of the Moltbank Skill and `@moltbankhq/cli` without an immutable version, lockfile, archive digest, or package integrity value. The use of `npx` can download and execute package tooling dynamically. The CLI installation is global, and npm package installation may execute lifecycle scripts with the privileges of the invoking user. Consequently, the effective code installed by these comma ...[truncated 1467 chars]
Remediation
<![CDATA[ ## Remediation Suggestions 1. Pin the Skill and CLI to explicitly reviewed versions rather than installing the mutable latest release. 2. Record and verify immutable package integrity hashes or signed provenance attestations before installation. 3. Require `npm audit signatures` or an equivalent signature-verification step during initial installation as well as updates. 4. Fail closed if signatures, attestations, package identity, version, or integrity values do not match the approved release. 5. Prefer a project-local installation over a global installation to reduce the affected scope. 6. Use a lockfile for all transitive dependencies and review changes before updating it. 7. Disable npm lifecycle scripts where operationally possible, or install in a restricted sandbox with minimal filesystem and credential access. 8. Avoid dynamically downloading package tooling through `npx`; use a pinned, previously verified installer. ]]>

T09 · Insecure Skill Coding Practices

Warning
Location
SKILL.md:81
Finding
Shell Command Injection Through User-Controlled Agent Profile Names<![CDATA[ ## Vulnerability Details **File Location**: `SKILL.md:81-89` **Vulnerability Type**: Shell command injection through unsafe string interpolation **Risk Level**: Medium ### Vulnerable Code ```markdown 4. **Setup (if needed):** If the user wants a new profile: a. Ask the user one question: *"What should this agent be called in the Moltbank UI?"* (1-64 chars; e.g. "Trading Bot", "Slack Notifier"). The CLI uses this as both the display name shown in the Moltbank UI and (after slugification) the local profile directory. b. Run `moltbank auth begin --name "<name from step a>" --json`. The output JSON contains `credentialsPath`, `verification_uri_complete`, and `user_code`. The CLI rejects malformed or off-host URLs before returning, so a JSON success exit means the URL is safe to show. c. Show the URL and code to the user; tell them to verify the domain is `app.moltbank.bot` before opening it. d. Run `export MOLTBANK_CREDENTIALS_PATH="<credentialsPath from step b output>"` in the session shell. e. Ask the user to approve in the browser and reply `done`. f. Run `moltbank auth poll --json` to finalize the session. To rename an agent later, run `moltbank agent rename --name "<new name>" --json`. ``` ### Technical Analysis The profile name and replacement name originate from chat input and are inserted into shell command examples inside double quotes. The documented validation only imposes a length of 1–64 characters. It does not prohibit double quotes, command substitutions, shell expansions, redirection operators, or other metacharacters. Quoting an interpolated value with double quotes is insufficient when the value itself can contain quote-breaking syntax or command substitutions. Shell parsing occurs before the Moltbank CLI receives the argument, so CLI-side validation cannot prevent commands injected at the shell layer. The credentials-path export is also constructed from command output. Although the Skill says that the profile pa ...[truncated 1374 chars]
Remediation
<![CDATA[ ## Remediation Suggestions 1. Invoke the CLI through a process API that accepts a program and argument array without invoking a shell. For example, pass the profile name as one argument rather than constructing a command string. 2. Apply a strict allowlist to profile names before execution. Permit only the characters operationally required, such as letters, digits, spaces, hyphens, and underscores. 3. Explicitly reject quotes, backticks, dollar signs, control characters, newlines, semicolons, pipes, redirection operators, and shell substitution syntax. 4. Do not rely on CLI-side validation to prevent shell injection because shell evaluation occurs first. 5. Treat `credentialsPath` as structured output and set it through the execution API's environment map rather than issuing an interpolated `export` shell statement. 6. If shell execution is unavoidable, use a platform-appropriate escaping routine that produces one literal argument, and test it against quote termination, command substitution, newlines, and expansion operators. 7. Document that profile display names and credential paths must never be concatenated into executable shell text. ]]>
Vulnerability Patterns
  • 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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
Findings (6)

Credential Access

High
Category
Privilege Escalation
Content
* Do not install this skill or the `moltbank` CLI unless the user explicitly approves it.
* Do not invent custom install commands when a platform-declared install flow exists.
* Do not state that setup succeeded unless command output in this session confirms it.
* Keep secrets local; never print full tokens, access tokens, or private keys.
Confidence
70% confidence
Finding
Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Autonomous Decision Making

Medium
Category
Excessive Agency
Content
For any account-scoped action that needs a sender or Safe address:

1. If `accountName` is known, resolve the account internally (`moltbank account details --json`).
2. Do not ask the user for a raw Safe address when `accountName` is already known.
3. Ask for raw addresses only when no account context is available.

## Update-Required Handling
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.

Rp1

Medium
Category
MCP Rug Pull
Confidence
88% confidence
Finding
This is the same unpinned `npx skills` invocation in a security-sensitive onboarding path. Because the skill also handles authentication and financial operations, any compromise in the bootstrap helper increases exposure to credential theft or arbitrary command execution.

Rp1

Medium
Category
MCP Rug Pull
Confidence
90% confidence
Finding
`npx skills add moltbankhq/moltbank-skill` is an unpinned runtime/package reference that can resolve to changing code. In the context of installing an agent skill, this could silently introduce a malicious or unexpected version of the installer or dependency chain.

Rp1

Medium
Category
MCP Rug Pull
Confidence
90% confidence
Finding
The dependency setup section again directs use of `npx skills` without version pinning. Repetition of the same pattern in multiple setup paths broadens the attack surface and makes compromise more likely in real use, especially since this skill operates with finance-related privileges.

Description-Behavior Mismatch

Medium
Confidence
82% confidence
Finding
The manifest description says only 'CLI-first + optional local MCP bridge guidance' while the broader skill metadata advertises treasury management, payment approvals, purchases, and trading functions. For a finance-capable skill, understating or omitting sensitive operational capabilities can mislead users, reviewers, or policy engines about the true privilege and risk profile, increasing the chance of unsafe approval or deployment.

Static analysis

No suspicious patterns detected.