Caveat verdict

kindle-download

🟠 Risky

Significant risk patterns flagged — automated deep scan, not behavioral proof.

The skill automates downloading ebooks from Z-Library (a known piracy site) and emailing them to a Kindle device, requiring storage of Z-Library account credentials; while a legal disclaimer is included, the primary use case facilitates copyright infringement and stores sensitive credentials in an auth.json file.

⚠ Flagged for review — coarse, uncorroborated signal, not a confirmed exploit. Review the config yourself before installing.

Automated static analysis — not a human review. Caveat flags capabilities, not confirmed intent, and can produce false positives. Disagree with this verdict? Use Dispute below.

security

transparency

maintenance

Findings (16)

Pattern match critical

Pipe-to-shell pattern (curl | sh) — supply chain attack vector

INSTALL.md · code · curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.0/install.sh | bash

Pattern match critical

Pipe to bash — executes piped content as shell commands

INSTALL.md · code · | bash

Pattern match critical

Possible hardcoded credential

INSTALL.md · code · PASSWORD="your_zlibrary_password

Pattern match high

References sudo — requests elevated privileges

INSTALL.md · code · sudo

Pattern match high

apt-get install — installs system packages

INSTALL.md · code · apt-get install

Pattern match high

Accesses shell history/config

INSTALL.md · code · ~/.zshrc

Pattern match high

HTTP request to bare IP address — common in malicious payloads

INSTALL.md · code · http://127.0.0.1

Pattern match high

Pipe to python — executes piped content as Python code

INSTALL.md · prose · downgraded · | Python

Pattern match high

Uses eval() — can execute arbitrary code

SECURITY.md · prose · downgraded · eval(

Pattern match medium

pip3 install — installs Python packages at runtime

INSTALL.md · code · pip3 install

Pattern match medium

setuid — privilege escalation mechanism

scripts/workflow.js · prose · downgraded · setuid

Pattern match medium

Uses exec() — may execute shell commands

SECURITY.md · prose · downgraded · exec(

Pattern match medium

Sets world-executable permissions

SECURITY.md · code · chmod 700

Pattern match medium

Accesses system credential store

SECURITY.md · prose · downgraded · Keychain

Pattern match low

Python os.environ.get — reads environment variable

scripts/send_kindle.py · prose · downgraded · os.environ.get(

Pattern match low

Accesses sensitive environment variables

scripts/workflow.js · prose · downgraded · process.env.KINDLE_SMTP_AUTH

Why the tier is capped

Execution sink present in raw bytes (Hard Floor: class A). Final tier capped at Caution — cannot be lifted by any downgrade, example-payload opt-in, or allowlist.

Permissions & capabilities

No declared permissions — minimal attack surface.

Is this flag fair?

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