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agent-browser

73

Quality

92%

Does it follow best practices?

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SecuritybySnyk

Critical

Do not install without reviewing

SKILL.md
Quality
Evals
Security

Security

2 findings: 1 critical severity, 1 high severity. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.

Critical

E005: Suspicious download URL detected in skill instructions.

What this means

Detected a suspicious URL in the skill instructions that could lead the agent to download and execute malicious scripts or binaries. This includes links to executables from untrusted sources, typosquatting of official packages, URL shorteners that obscure the destination, and personal file hosting services.

Why it was flagged

While many entries are benign placeholders or official pages (example.com, lightpanda.io docs, github.com/login), the list also contains an explicit malicious domain (malicious.com) and several ambiguous/unvetted hosts (site-a.com, site-b.com, prod/staging/app subdomains) and includes localhost/GitHub login entries — because the skill instructs downloading/executing from these URLs the presence of an explicitly malicious domain and untrusted hosts makes the set a suspicious potential malware-distribution vector.

Report incorrect finding
High

W007: Insecure credential handling detected in skill instructions.

What this means

The skill handles credentials insecurely by requiring the agent to include secret values verbatim in its generated output. This exposes credentials in the agent’s context and conversation history, creating a risk of data exfiltration.

Why it was flagged

The prompt includes examples that embed plaintext passwords and session tokens directly in CLI commands and state files (e.g., agent-browser fill "password123", state files with session tokens), which would require an LLM to include secrets verbatim in generated commands or code.

Low

Low-risk findings.

1 low severity finding. Worth noting, but not necessarily harmful.

Low

W011: Third-party content exposure detected (indirect prompt injection risk).

What this means

The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.

Why it was flagged

This skill explicitly automates browsing arbitrary URLs and ingesting page content (e.g., SKILL.md core workflow and templates show agent-browser open <url>, agent-browser snapshot -i, and agent-browser get text body) so the agent will read untrusted third-party web content and use it to drive subsequent actions.

Repository
tibelf/ai_project_init
Audited
Security analysis
Snyk

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