io.github.littlebearapps/outlook-assistant

What we checked

Six static checks, weighted by risk. Every result reflects only what could be observed in the published package and repository — never intent.

• Injection surface

  unscannable25% of grade

  Tool descriptions/manifest scanned for instruction-injection patterns (imperatives at the model, hidden text, 'ignore previous', data-exfil URLs).

  No tool descriptions, server instructions, prompts, or resources were fetched; nothing to scan for injection.

• Supply chain

  pass25% of grade

  Package provenance: namespace verification, repo linkage, maintainer count, account age, postinstall scripts, typosquat distance.

  install hook "prepare" is a recognized benign build command; repository linkage verified

• Credential hygiene

  pass15% of grade

  How the server takes secrets (env vs plaintext config vs hardcoded); secrets appearing in tool schemas.

  Reads secrets from the environment (e.g. config.js) — the recommended intake shape. PASS = no static red flag; static analysis cannot prove the code honors env-based secret handling at runtime.

• Permission scope

  warn15% of grade

  Declared tools vs. breadth (filesystem, network, exec); flags shell-exec and unbounded filesystem access.

  discloses broad/destructive filesystem access: calendar/accept.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/attachments.js: destructive/writing fs.* call (write/unlink/rm/chmod/rename) discloses broad/destructive filesystem access: email/attachments.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: calendar/cancel.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/conversations.js: destructive/writing fs.* call (write/unlink/rm/chmod/rename) discloses broad/destructive filesystem access: email/conversations.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: calendar/create.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: folder/create.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: rules/create.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: calendar/decline.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: calendar/delete.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: folder/delete.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/delta.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/export.js: destructive/writing fs.* call (write/unlink/rm/chmod/rename) discloses broad/destructive filesystem access: email/export.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/folder-utils.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: utils/graph-api.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/headers.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: advanced/index.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: categories/index.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: contacts/index.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/index.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: rules/index.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: settings/index.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: calendar/list.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/list.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: folder/list.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: rules/list.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/mark-as-read.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/mime.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: folder/move.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: outlook-auth-server.js: destructive/writing fs.* call (write/unlink/rm/chmod/rename) discloses broad/destructive filesystem access: email/read.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/search.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: email/send.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: folder/stats.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: auth/token-manager.js: destructive/writing fs.* call (write/unlink/rm/chmod/rename) discloses broad/destructive filesystem access: auth/token-manager.js: path traversal ('../') combined with file access discloses broad/destructive filesystem access: auth/token-storage.js: destructive/writing fs.* call (write/unlink/rm/chmod/rename) discloses broad/destructive filesystem access: auth/tools.js: path traversal ('../') combined with file access Capability DISCLOSURE, not a verdict: static analysis sees the primitive is present and reachable, not whether its use is attacker-controlled.

• Version behavior

  unscannable10% of grade

  Diff of tool definitions between versions; new permissions or changed descriptions in a patch release (the postmark-mcp class).

  no prior version to diff (first sight of io.github.littlebearapps/[email protected]); version-drift / rug-pull cannot be evaluated. Cold-start risk is covered by point-in-time checks (injection_surface, supply_chain, credential_hygiene), not here.

• Transport config

  warn10% of grade

  Remote servers: TLS and auth mode (none/token/OAuth). Local servers: whether the manifest indicates it phones home.

  manifest/source references Tracking behavior — disclosure