io.github.HorizunGroup/horizun-pbi-mcp

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.

  Python build script has no build-time network/exec; repository linkage verified

• Credential hygiene

  warn15% of grade

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

  tests/test_dax_limits_redaction.py: contains a hardcoded JWT (eyJh…7u (len 69)) — in an example/sample file; verify it is not a real key. tests/test_power_query.py: assigns a literal to token (Ab3x…H4 (len 24)) — non-provider secret literal; prefer environment intake. tests/test_secretos_en_conversion.py: assigns a literal to password ({CLA…A} (len 17)) — non-provider secret literal; prefer environment intake. tests/test_secretos_en_conversion.py: assigns a literal to token ({CLA…A} (len 17)) — non-provider secret literal; prefer environment intake. Reads secrets from the environment (e.g. src/horizun_pbi_mcp/branding.py) — the recommended intake shape.

• Permission scope

  warn15% of grade

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

  has both shell/exec and network egress — capable of download-and-run, though no such path was observed (src/horizun_pbi_mcp/completado/validador.py: subprocess.* call; src/horizun_pbi_mcp/completado/esquemas.py: outbound HTTP/socket call). has both shell/exec and destructive filesystem writes (src/horizun_pbi_mcp/completado/validador.py: subprocess.* call; src/horizun_pbi_mcp/completado/validador.py: destructive filesystem call (shutil.rmtree/os.remove/etc.)). discloses shell/exec capability: 7 files (src/horizun_pbi_mcp/completado/validador.py, src/horizun_pbi_mcp/lifecycle/healthcheck.py, src/horizun_pbi_mcp/powerbi/desktop_helper.py, +4 more) discloses broad/destructive filesystem access: 8 files (src/horizun_pbi_mcp/completado/validador.py, src/horizun_pbi_mcp/lifecycle/promotion.py, src/horizun_pbi_mcp/pbip/backup.py, +5 more) Capability DISCLOSURE, not a verdict: static analysis sees the primitive is present and reachable, not whether its use is attacker-controlled.

• Version behavior

  fail10% of grade

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

  vs prior 2.0.1 (minor bump): new capability primitive(s) in source: fs-write, subprocess; new hardcoded outbound host/BCC destination(s): 127.0.0.1, api.x, contoso.sharepoint.com, developer.microsoft.com, download.invalid, ejemplo, ejemplo.invalido, evil.example, example.invalid, example.sharepoint.com, github.com, graph.microsoft.com, horizunhub.com, json-schema.org, login.microsoftonline.com, s, schemas., schemas.microsoft.com, schemas.openxmlformats, schemas.openxmlformats.org, svc, uploads.github.com, user, www.apache.org, www.nuget.org, x, x.invalid.

• 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 telemetry behavior — disclosure