Security Audit

nextjs-supabase-auth

github.com/davila7/claude-code-templates

AI SkillCommit 458b11867eae

CAUTION

Scanned 12 days ago

Critical

Immediate action required

High

Priority fixes suggested

Medium

Best practices review

Low

Acknowledged / Tracked

Trust Assessment

nextjs-supabase-auth received a trust score of 60/100, placing it in the Caution category. This skill has some security considerations that users should review before deployment.

SkillShield's automated analysis identified 3 findings: 1 critical, 0 high, 1 medium, and 1 low severity. Key findings include Network egress to untrusted endpoints, Covert behavior / concealment directives, Prompt Injection Attempt in Skill Description.

The analysis covered 4 layers: Manifest Analysis, Static Code Analysis, Dependency Graph, LLM Behavioral Safety. All layers scored 70 or above, reflecting consistent security practices.

Last analyzed on February 11, 2026 (commit 458b1186). SkillShield performs automated 4-layer security analysis on AI skills and MCP servers.

Layer Breakdown

Manifest Analysis

91%

Static Code Analysis

100%

Dependency Graph

100%

LLM Behavioral Safety

70%

Behavioral Risk Signals

Network Access

1 finding

Dynamic Code

1 finding

Security Findings3

Severity	Finding	Layer	Location
CRITICAL	Prompt Injection Attempt in Skill Description The untrusted `SKILL.md` content attempts to manipulate the host LLM's persona by instructing it to act as an 'expert in integrating Supabase Auth with Next.js App Router'. This is a direct prompt injection attempt, as content within the untrusted delimiters should be treated as data, not instructions for the LLM. Remove or rephrase the instruction 'You are an expert in integrating Supabase Auth with Next.js App Router.' from the untrusted `SKILL.md` content. Untrusted content should describe the skill's capabilities and context, not instruct the LLM on its role or persona.	LLM	SKILL.md:3
MEDIUM	Network egress to untrusted endpoints HTTP request to raw IP address Review all outbound network calls. Remove connections to webhook collectors, paste sites, and raw IP addresses. Legitimate API calls should use well-known service domains.	Manifest	cli-tool/components/mcps/devtools/figma-dev-mode.json:4
LOW	Covert behavior / concealment directives Multiple zero-width characters (stealth text) Remove hidden instructions, zero-width characters, and bidirectional overrides. Skill instructions should be fully visible and transparent to users.	Manifest	cli-tool/components/mcps/devtools/jfrog.json:4

Scan History

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