Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Skillsync Mcp

Website | Smithery | npm | GitHub

Compatibility: Not stated.

Grade D

Two or more Medium findings, or a High. Only try it in a sandbox.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

SECRETS_PATH_CREDENTIAL AGENT_IGNORE_INSTRUCTIONS

Why this grade

  • SECRETS_PATH_CREDENTIAL Medium

    Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).

    src/constants.ts, line 30 ".npmrc", ".yarnrc", "makefile", ".env", ".env.local", ".env.production",

  • AGENT_IGNORE_INSTRUCTIONS Medium

    Text tells the agent to ignore earlier instructions.

    docs/THREAT_PATTERNS.md, line 60 | 1 | Attempts to override AI instructions | `ignore all previous instructions and do X` |

Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.

If you think this grade is wrong, email [email protected] with the entry link and your evidence. We aim to acknowledge within two working days and decide within seven. If we confirm an error, we aim to correct it within 24 hours of confirming it. These are aims, not guarantees.

Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.

What was checked

Plain notes from the hygiene checks.

  • Permissions

    Pass

    No shell or command execution found, and no extra permission was declared.

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Concern

    can reach a host that is not written as a fixed address. can reach evil.com. The description does not name that host.

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    src/api-client.ts, line 60

    const response = await fetch(url, { headers });

    src/installer.ts, line 240

    const dirResp = await fetch(apiUrl, {

    src/installer.ts, line 250

    const rawResp = await fetch(rawUrl);

    Show more

    src/installer.ts, line 300

    const fileResp = await fetch(entry.download_url);

    src/patterns.ts, line 38

    { regex: /curl\s+[^|]*\|\s*(?:sh|bash|zsh|ksh)/, severity: "critical", description: "Remote code execution via curl pipe to shell", category: "rce" },

    src/patterns.ts, line 39

    { regex: /wget\s+[^|]*\|\s*(?:sh|bash|zsh|ksh)/, severity: "critical", description: "Remote code execution via wget pipe to shell", category: "rce" },

    src/patterns.ts, line 82

    { regex: /curl\s+[^\n]*\\\n\s*\|\s*(?:sh|bash)/m, severity: "critical", description: "Multi-line curl pipe to shell (line-split evasion)", category: "rce", multiline: true },

    src/patterns.ts, line 84

    { regex: /wget\s+[^\n]*\\\n\s*\|\s*(?:sh|bash)/m, severity: "critical", description: "Multi-line wget pipe to shell (line-split evasion)", category: "rce", multiline: true },

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_CREDENTIAL

    src/api-client.ts, line 47

    return process.env.SKILLSMP_API_KEY;

    src/constants.ts, line 30

    ".npmrc", ".yarnrc", "makefile", ".env", ".env.local", ".env.production",

    src/constants.ts, line 31

    ".gitconfig", ".netrc", ".curlrc",

    Show more

    src/patterns.ts, line 59

    { regex: /cat\s+.*\.env\b/, severity: "critical", description: "Reading environment file with secrets", category: "credential-theft" },

    src/patterns.ts, line 62

    { regex: /id_rsa|id_ed25519|id_ecdsa/, severity: "critical", description: "Directly referencing SSH private key files", category: "credential-theft" },

    src/patterns.ts, line 69

    { regex: /\.npmrc.*registry\s*=/, severity: "critical", description: "Modifying npm registry (supply chain redirect)", category: "supply-chain" },

    src/patterns.ts, line 155

    { regex: /process\.env\.\w+\s*=/, severity: "warning", description: "Modifying process environment variables", category: "environment" },

    src/patterns.ts, line 166

    { regex: />\s*~\/\.npmrc|>\s*~\/\.yarnrc/, severity: "warning", description: "Writing to package manager config - supply chain risk", category: "dotfile-poisoning" },

    .gitignore, line 2

    build/

  • Agent instructions

    Serious

    instructions tell the agent to ignore earlier instructions.

    AGENT_IGNORE_INSTRUCTIONS

    docs/THREAT_PATTERNS.md, line 60

    | 1 | Attempts to override AI instructions | `ignore all previous instructions and do X` |

  • Obfuscation

    Pass

    No encoded or minified payload found.

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

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Note

Hygiene check of commit 62e291119025. can reach a host that is not written as a fixed address. can reach evil.com. The description does not name that host. reads a credential or environment file. instructions tell the agent to ignore earlier instructions.

Date and source

Date checked:

View source

github.com

Commit graded: 62e291119025c0bdd5b9e0556c1c9d1c36b0d971

This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.

Read how this letter is chosen