Versioned security assessment

Report ID: SA-88A205C7

7/8/2026, 4:50:24 PM

webapp-testing security assessment v4

Skill Security Certification Report

Audit History
Audit model: codex Latest published report
Skill name
webapp-testing
Version
v4
Maintainer
ZhanlinCui
Source
github.com/ZhanlinCui/Ultimate-Agent-Skills-Collection/tree/main/webapp-testing
Coverage
5 Files scanned · 310 Lines analyzed
Policy version
Unavailable

Highest confirmed finding severity

High

1 confirmed security finding requires attention.

Installation context

Check the current Skill page

This page summarizes report evidence only. The Skill page provides the canonical install advisory.

Open current Skill page

This report does not block or authorize the manifest or ZIP.

Most static Markdown and localhost findings are false positives from documentation examples or local debugging artifacts. The helper script does execute user-supplied commands, including shell=True server commands, and the skill text discourages source review before execution.

Report position

Latest published report

Latest refers to the report sequence, not to artifact currentness.

Audit attestation

Not attestable

The required immutable binding is incomplete.

Human verification

Not verified

No human verification is recorded for this report.

Coverage

5 Files scanned · 310 Lines analyzed

5 items shown for review

Limitations

This report does not claim runtime or sandbox execution and does not prove the absence of side effects.

Evidence chain

Follow the evidence from source binding to the install contract. Available evidence supports verification; it is not a safety guarantee.

  1. Source

    Commit and path bound

  2. Artifact

    Content and tree hashes bound

  3. Audit

    Complete

  4. Install contract

    Open manifest to verify

    Open manifest

Capabilities observed

Observed means this report recorded supporting evidence. Not recorded does not prove that a capability is absent.

Contains scripts

May execute code included with the Skill.

Not recorded by this audit

Network access

May connect to external services.

Observed in 3 evidence locations

Filesystem access

May read or write local files.

Observed in 4 evidence locations

Env variables

May read values from the process environment.

Not recorded by this audit

External commands

May invoke commands or programs outside the Skill.

Observed in 23 evidence locations

Capability review items (4)
High
scripts/with_server.py:88
Python subprocess.run
result = subprocess.run(args.command)
The helper executes the trailing command supplied on the CLI. This is intended behavior, but it still enables arbitrary local command execution if unsafe arguments are provided.
High
scripts/with_server.py:69
Python subprocess.Popen
process = subprocess.Popen(
The helper starts user-supplied server commands with shell=True. That creates real shell command execution risk if untrusted command text reaches --server.
Medium
SKILL.md:40-42
Ruby/shell backtick execution
```bash
The fenced bash example instructs agents to run the helper with an npm server command. It is legitimate usage, but still documents local external command execution.
Medium
SKILL.md:45-50
Ruby/shell backtick execution
```bash
The fenced bash example includes cd, python, npm, and multiple --server commands. It documents shell-based local server startup that requires trusted inputs.

Risk findings

Confirmed security concerns are separated from items that still need review.

Confirmed security concerns (1)

RISK-001 High
SKILL.md:14SKILL.md:85
Prompt Injection Attempt Detected
The skill says "DO NOT read the source" and promotes bundled scripts as black boxes before execution, which can suppress review of risky helper code.
The wording directly instructs agents to avoid source inspection before running bundled scripts. The risk is confirmed by the helper using shell=True, but the text may be intended as context management rather than malicious evasion.

Remediation

Suggested fixes recorded by this audit. Applying them is the maintainer’s responsibility.

  1. FIX-001
    High
    Server commands are launched with shell=True.
    Accept server commands as argument arrays, add allowlisted presets, or require explicit confirmation before shell execution.
  2. FIX-002
    High
    The skill tells agents not to read bundled script source before use.
    Replace black-box guidance with advice to inspect helper behavior and run --help before executing trusted commands.
  3. FIX-003
    Medium
    Examples use fixed output paths for screenshots and console logs.
    Make output paths configurable and document that generated artifacts may contain local application data.

Expert evidence

Immutable subject identity, scanner metadata, dismissed matches, and source-level evidence.

Artifact subject

Marketplace commit
88a205c7f635a966e31156313b590d59007c5caa
Content hash
51b7349e77ec63b7744a6f63647e7566a0b4d2e301121cc10e8c2113af6556a2
Tree hash
d849dc424b596be812db6119412ac305af5f8870905578be369a477f2c8bc42e
Skill path
skills/zhanlincui/webapp-testing
Audit payload hash
1049d1a3461676009ecf50b57346ff56

Analysis metadata

Audit model: codex

Analysis state: Complete

Scope is limited to the recorded files, lines, methods, and evidence. No runtime or sandbox execution is claimed.

Verify and export

JSON report CITATION.cff SARIF 2.1.0 Signed installation manifest Source

The manifest and lockfile bind install artifacts to cryptographic hashes. This integrity claim is separate from the security assessment.

Audit attestation: not_attestable