Versioned security assessment

Report ID: SA-771C5E9E

7/1/2026, 2:48:32 AM

webapp-testing security assessment v2

Skill Security Certification Report

Audit History

Audit model: codex Historical report

Skill name: webapp-testing
Version: v2
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

Historical evidence

This report may not describe the currently installable artifact. Open the current Skill page for install guidance.

Open current Skill page

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

Static findings for weak cryptography are false positives; the cited lines contain description text and argparse setup, not cryptographic algorithms. The skill still has confirmed high-risk behavior because it encourages black-box script execution and includes a helper that runs user-supplied server commands through a shell.

Report position

Historical report

Open audit history before using this report to install.

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

4 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.

Source

Binding unavailable
Artifact

Identity incomplete
Audit

Complete
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.

Observed in 1 evidence location

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 2 evidence locations

Capability review items (3)

High

scripts/with_server.py:68-74

User-Supplied Shell Command Execution

with_server.py passes the --server argument to subprocess.Popen with shell=True. A crafted server string can execute arbitrary shell operations in the caller environment.

The code explicitly uses shell=True with an argument supplied through the command line. The behavior is intentional, but it is still a clear arbitrary command execution surface.

Medium

scripts/with_server.py:86-89

Arbitrary Follow-Up Command Execution

with_server.py runs the remaining command-line arguments after servers are ready. This is expected for the tool, but it can execute unsafe commands if prompt input is untrusted.

The command is executed without shell=True, which reduces injection risk. It still runs arbitrary user-selected programs as part of normal operation.

Medium

examples/console_logging.py:31 examples/element_discovery.py:37-38 SKILL.md:69

Browser Output Written to Local Filesystem

Example scripts write console logs and screenshots to local paths. This is useful for debugging but can store sensitive page content outside the project.

The writes are explicit and local, so this is not exfiltration. The risk is moderate because captured browser content can include private data.

Risk findings

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

Confirmed security concerns (1)

RISK-001 High

SKILL.md:14 SKILL.md:85

Prompt Injection Attempt Detected

SKILL.md instructs agents to avoid reading helper source before running it and to treat scripts as black boxes. This can suppress inspection of executable code before use.

The text directly tells the agent not to read source before executing helper scripts. It is suspicious in a marketplace skill because it can interfere with source inspection and safety review.

Expert evidence

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

Artifact subject

Marketplace commit: Unavailable
Content hash: Unavailable
Tree hash: Unavailable
Skill path: Unavailable
Audit payload hash: Unavailable

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.

Static false positives ignored (2)

Low

examples/console_logging.py:5 examples/element_discovery.py:10 SKILL.md:59

Hardcoded Localhost URLs Are Benign Examples

The detected URLs point to localhost and are used as example targets for local web testing. No external data exfiltration endpoint is present.

All cited URLs use localhost and match the stated purpose of testing local web applications. I did not find evidence of remote collection or transmission.

Low

SKILL.md:3 scripts/with_server.py:36-38 SKILL.md:88

Weak Cryptography Alerts Are False Positives

The cited lines contain descriptive metadata and argparse option definitions, not weak hashing or cryptographic operations. No evidence found for cryptographic misuse.

The cited lines were reviewed directly and contain no cryptographic API usage. This is a scanner pattern mismatch.

Verify and export

JSON report CITATION.cff SARIF 2.1.0 Signed installation manifest

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

Audit attestation: not_attestable