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site.mailly/mcp

site.mailly/mcp v0.3.1

Security Trust Score
Grade B · Moderate posture
Tier 1 · Public sourceHigh confidence · 98%
Declared MCP capabilities
Prompts

Host site.mailly/mcp in a governed environment — SSO in front, every tool call attributed and audited.

Reputation0stars0forks0open issuestodaylast commit<1yage

Security controls

Deterministic, evidence-backed. Score earned from passing controls; a failed guard caps it.

Model–MCP Runtime Guardrails

  • Warn
    Strict JSON Schema Enforcementschemas not strict

    Tool inputs are constrained (additionalProperties:false), so unexpected arguments can't be smuggled in.

    Fix: Set additionalProperties:false and require explicit parameters on every tool.

  • Pass
    Indirect Prompt Injection (IPI) Defensesguardno injection markers

    Tool/prompt/resource text is free of hidden instructions that could hijack the agent.

  • Pass
    User-in-the-Loop / Approval Scopeguardno destructive tool scope

    No over-broad or destructive tools (arbitrary shell, bulk-delete) that warrant human approval.

  • N/A
    Tool Definition Integrityguardno prior version to diff

    Every consecutive version pair is diffed for new injection markers or destructive scope — a risky diff anywhere in history is a rug-pull (fail, durable); benign description drift warns.

Application Security Checks

  • Warn
    No path traversalguard7 occurrences

    Naive path checks let tools read/write outside intended directories (EscapeRoute-class).

    src/lib/inbox-image-proxy.ts:64src/lib/inbox-image-proxy.ts:78src/lib/remote-image.ts:110src/server.ts:63

    Fix: Resolve to a canonical path and verify containment; reject ../ and symlinks.

  • Warn
    No SSRF sinksguard2 occurrences

    Fetching tool-supplied URLs can pivot into internal networks and metadata services.

    src/worker.ts:23src/worker.ts:32

    Fix: Allow-list destinations; reject arbitrary/loopback/link-local URLs.

  • Warn
    Credentials sourced from environmentno env-based config detected

    Reading secrets from env/secret stores avoids hardcoding them.

    Fix: Read credentials from environment variables or a secret manager.

  • Warn
    No known-vulnerable dependencies2 of 217 runtime deps vulnerable; worst high

    Runtime dependencies (parsed from the lockfile) are scanned against OSV.dev for published CVEs. Advisory: flagged dependencies lower the score but don't hard-cap it, since transitive reachability is unproven.

    @modelcontextprotocol/[email protected] — GHSA-6qxp-vccf-f47h@modelcontextprotocol/[email protected] — GHSA-6qxp-vccf-f47h

    Fix: Upgrade the flagged dependencies past their fixed versions.

  • Warn
    Has a security policyno security policy

    A SECURITY.md gives a private path to report vulnerabilities.

    Fix: Add SECURITY.md with a disclosure contact and process.

  • Warn
    Adoption & popularitylimited adoption

    A small, capped nudge from stars/downloads — widely-used servers get more eyes on bugs. It can never offset a real security failure.

    Fix: Adoption grows naturally with real-world use; this never gates the score.

  • Pass
    No command-injection sinksguardno sinks found

    Untrusted tool input reaching a shell yields remote code execution.

  • Pass
    No dynamic code executionguardno sinks found

    eval()/exec()/Function() on tool-derived strings allows arbitrary code execution.

  • Pass
    No unsafe deserializationguardno sinks found

    pickle/yaml.load/etc. on untrusted data can execute code.

  • Pass
    No committed secretsguardno secrets found

    Hardcoded keys/tokens in published source are live credentials an attacker can use.

  • Pass
    Dependencies pinned (lockfile)lockfile present

    A lockfile makes installs reproducible and resistant to silent dependency swaps.

  • Pass
    Actively maintainedrecent commits

    Unmaintained servers don't receive security fixes.

  • Pass
    Repository not archivedguardactive

    Archived repositories will never be patched.

  • Pass
    Declares a licenseMIT

    A clear license is required for legal enterprise use.

  • Not checked
    Signed releasesnot evaluated

    Signed releases let consumers verify artifacts weren't tampered with.

  • N/A
    No install/post-install scriptsguardno published package

    install hooks run arbitrary code on every consumer at install time.

  • N/A
    Package name not typosquattingguardno published package

    Names mimicking popular packages are a common malware delivery vector.

  • N/A
    Published with provenanceno published package

    Build provenance attests the artifact was built from the claimed source by CI.

  • N/A
    Established maintainerno published package

    Brand-new / single anonymous maintainers raise takeover and malware risk.

Transport & Trust Model

  • Warn
    Execution Sandboxingruns natively (no container image)

    A container/sandbox image limits blast radius; a server that runs natively has full host access.

    Fix: Ship a Dockerfile/Containerfile (or document a sandboxed run) so the server runs isolated.

  • Pass
    Transport Encryption (TLS)guardall remotes use HTTPS

    Plaintext HTTP exposes traffic and bearer tokens to interception.

  • Pass
    IAM / Authentication ScopingOAuth / PRM handling detected

    OAuth 2.1 / Protected Resource Metadata gates who can invoke tools.

  • Pass
    Network Exposureno bind-all detected

    Binding 0.0.0.0 or exposing debug inspectors widens the attack surface.

  • N/A
    Live Endpoint Reachablenot dynamically scanned

    A dynamic scan connected to the declared remote endpoint and it responded — verified live, not a dead URL.

  • N/A
    Authentication Enforced (live)not dynamically scanned

    If the server declares auth is required, it must actually reject anonymous clients. Serving tools to unauthenticated callers is a real exposure.

Tools (69)

mailly_accountmailly_add_domainmailly_load_imagemailly_save_agentmailly_save_draftmailly_send_emailmailly_get_contactmailly_list_agentsmailly_list_draftsmailly_read_threadmailly_get_campaignmailly_get_templatemailly_get_workflowmailly_list_domainsmailly_list_threadsmailly_read_messagemailly_save_contactmailly_setup_domainmailly_update_draftmailly_approve_draftmailly_discard_draftmailly_list_contactsmailly_save_audiencemailly_wait_for_mailmailly_delete_contactmailly_delete_messagemailly_list_audiencesmailly_list_campaignsmailly_list_templatesmailly_list_workflowsmailly_delete_audiencemailly_forward_messagemailly_import_contactsmailly_list_agent_runsmailly_manage_campaignmailly_manage_templatemailly_manage_workflowmailly_release_messagemailly_render_templatemailly_get_sent_messagemailly_prepare_campaignmailly_preview_audiencemailly_suppress_contactmailly_get_inbox_webhooksmailly_list_sent_messagesmailly_list_workflow_runsmailly_review_agent_draftmailly_save_inbox_webhookmailly_send_template_testmailly_test_inbox_webhookmailly_cancel_workflow_runmailly_save_template_draftmailly_save_workflow_draftmailly_create_inbox_addressmailly_delete_inbox_addressmailly_list_delivery_eventsmailly_list_inbox_addressesmailly_remove_inbox_webhookmailly_replay_delivery_eventmailly_resubscribe_recipientmailly_save_delivery_webhookmailly_set_thread_read_statemailly_get_workspace_settingsmailly_get_subscription_statusmailly_save_marketing_settingsmailly_update_campaign_contentmailly_list_campaign_recipientsmailly_resend_campaign_failuresmailly_save_inbox_webhook_endpoint