io.github.wazionapps/nexo

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

  warn25% of grade

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

  no resolvable repository linked to the package (provenance unverifiable)

• 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. bin/nexo-brain.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

  fail15% of grade

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

  HIGH: shell/exec capability AND destructive filesystem writes together (bin/nexo-brain.js: imports child_process and calls exec/spawn; bin/nexo-brain.js: destructive/writing fs.* call (write/unlink/rm/chmod/rename)). discloses shell/exec capability: bin/nexo-brain.js: imports child_process and calls exec/spawn discloses shell/exec capability: src/scripts/nexo-auto-update.py: subprocess.* call discloses shell/exec capability: src/scripts/nexo-catchup.py: subprocess.* call discloses shell/exec capability: src/scripts/nexo-daily-self-audit.py: subprocess.* call discloses shell/exec capability: src/scripts/nexo-sleep.py: subprocess.* call discloses shell/exec capability: src/tools_menu.py: subprocess.* call discloses dynamic code execution: src/plugins/episodic_memory.py: uses eval/exec/__import__ discloses broad/destructive filesystem access: bin/nexo-brain.js: destructive/writing fs.* call (write/unlink/rm/chmod/rename) discloses broad/destructive filesystem access: src/plugins/backup.py: destructive filesystem call (shutil.rmtree/os.remove/etc.) discloses broad/destructive filesystem access: src/scripts/nexo-auto-update.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: src/scripts/nexo-auto-update.py: destructive filesystem call (shutil.rmtree/os.remove/etc.) discloses broad/destructive filesystem access: src/scripts/nexo-catchup.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: src/scripts/nexo-daily-self-audit.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: src/scripts/nexo-postmortem-consolidator.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: src/scripts/nexo-sleep.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: src/scripts/nexo-sleep.py: destructive filesystem call (shutil.rmtree/os.remove/etc.) discloses broad/destructive filesystem access: src/scripts/nexo-synthesis.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: src/plugin_loader.py: destructive filesystem call (shutil.rmtree/os.remove/etc.) discloses broad/destructive filesystem access: src/server.py: open(…, 'w'/'a'/'x') write-mode 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.wazionapps/[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

  fail10% of grade

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

  source performs runtime self-update / download-and-execute (bypasses version_behavior); manifest/source references tracking behavior — disclosure