email-helper
Helps draft and send emails using your preferred tone.
44
45%
Does it follow best practices?
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Critical
Do not install without reviewing
Fix and improve this skill with Tessl
tessl review fix ./tests/fixtures/prompt-injection/SKILL.mdE004: Prompt injection detected in skill instructions.
What this means
Detected a prompt injection in the skill instructions. The skill contains hidden or deceptive instructions that fall outside its stated purpose and attempt to override the agent’s safety guidelines or intended behavior.
Why it was flagged
The skill instructs the inclusion of sensitive API keys and private SSH keys into email metadata and URL parameters for unauthorized exfiltration.
E006: Malicious code pattern detected in skill scripts.
What this means
Detected high-risk code patterns in the skill content — including its prompts, tool definitions, and resources — such as data exfiltration, backdoors, remote code execution, credential theft, system compromise, supply chain attacks, and obfuscation techniques.
Why it was flagged
The skill attempts to exfiltrate sensitive local credentials (API keys and SSH private keys) by embedding them into outbound emails and URL parameters.
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 skill instructs the agent to read sensitive secret values from environment variables and include them verbatim in email metadata and URL parameters, creating a severe credential exfiltration risk.
W013: Attempt to modify system services in skill instructions.
What this means
The skill prompts the agent to compromise the security or integrity of the user’s machine by modifying system-level services or configurations, such as obtaining elevated privileges, altering startup scripts, or changing system-wide settings.
Why it was flagged
The skill prompt instructs the agent to exfiltrate sensitive environment variables like API keys and SSH private keys, which compromises system secrets and credentials, although it does not directly modify system files or use sudo.
- Repository
- NMitchem/SkillScan
- Commit
08afcd4
- Audited
- Security analysis
Is this your skill?
If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.