mailtester

HIGH W007: Insecure credential handling detected in skill instructions.

• Insecure credential handling detected (high risk: 1.00). The skill's examples and flags explicitly instruct including plaintext credentials on the command line (e.g., -user/-pass secret), which requires the LLM to emit secret values verbatim and thus is high-risk for exfiltration.

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

• Third-party content exposure detected (high risk: 0.90). The SKILL.md instructs the agent to connect to arbitrary SMTP/IMAP hosts and run modes that list mailboxes and fetch message envelopes/capabilities (e.g., imap-list, imap-fetch, connection/starttls modes), which ingests untrusted, user-generated mail server content that the agent is expected to read and use to decide next actions.