Grades are a hygiene check, not a security guarantee.

Claude Code, Plugin

Prompt Shield

Prompt Shield, a plugin listed in the PlugVet directory.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

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

NETWORK_NO_FIXED_HOST SECRETS_PATH_UNCONFIRMED

Why this grade

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    src/prompt_shield/benchmarks/datasets.py, line 194 with urllib.request.urlopen(req, timeout=30) as resp: # noqa: S310

  • SECRETS_PATH_UNCONFIRMED Low

    The Secrets check reports a credential or environment file, but no quoted line shows a recognisable path.

    src/prompt_shield/detectors/d001_system_prompt_extraction.py, line 101 (?:environment\s+variables?|env\s+vars?|\.env|config(?:uration)?\s+(?:file|values?|se

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.

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.

    NETWORK_NO_FIXED_HOST

    src/prompt_shield/benchmarks/datasets.py, line 194

    with urllib.request.urlopen(req, timeout=30) as resp: # noqa: S310

    src/prompt_shield/vault/threat_feed.py, line 153

    with urllib.request.urlopen(req) as resp:

    docs/detectors.md, line 80

    Detects injection of HTML tags, script tags, markdown image/link syntax, data URIs, and event handlers that could alter rendering or exfiltrate data. Catches: `<img src=x onerror="

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_UNCONFIRMED

    src/prompt_shield/detectors/d001_system_prompt_extraction.py, line 101

    (?:environment\s+variables?|env\s+vars?|\.env|config(?:uration)?\s+(?:file|values?|se

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • 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 a019f71fa2ad. can reach a host that is not written as a fixed address. reads a credential or environment file.

Date and source

Date checked:

View source

github.com

Commit graded: a019f71fa2ad9f62d5776af3abd1aa9b3a7fe6dc

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