agent-slack

Fail

Audited by Gen Agent Trust Hub on May 5, 2026

Risk Level: HIGHREMOTE_CODE_EXECUTIONEXTERNAL_DOWNLOADSCOMMAND_EXECUTIONPROMPT_INJECTION
Full Analysis
  • [REMOTE_CODE_EXECUTION]: The installation instructions recommend downloading and executing a shell script from the vendor's official GitHub repository (https://raw.githubusercontent.com/stablyai/agent-slack/main/install.sh) by piping it directly to the shell.
  • [EXTERNAL_DOWNLOADS]: The skill documents installation via the agent-slack npm package and the Nix package manager, which involves downloading software from external registries.
  • [COMMAND_EXECUTION]: The skill instructs the agent to execute various Slack automation tasks using the agent-slack CLI binary, which is expected to be present on the system path.
  • [PROMPT_INJECTION]: The skill includes instructions to bypass platform security heuristics that force manual approval prompts. The agent is directed to avoid specific command patterns (such as using #, empty strings, or logical operators) to ensure commands are auto-allowed without user intervention.
  • [PROMPT_INJECTION]: The skill is susceptible to indirect prompt injection as it ingests untrusted data from Slack messages, threads, and file content.
  • Ingestion points: Slack message text, thread summaries, and file attachments fetched via agent-slack message get, message list, and search (documented in SKILL.md and references/output.md).
  • Boundary markers: No specific delimiters or instructions are provided to separate untrusted Slack data from agent instructions.
  • Capability inventory: The skill executes CLI commands via the agent-slack tool and performs file system writes when downloading attachments (documented in references/output.md).
  • Sanitization: Basic sanitization of mentions and escaping of special characters are performed for output, but no sanitization is applied to incoming untrusted data.
Recommendations
  • HIGH: Downloads and executes remote code from: https://raw.githubusercontent.com/stablyai/agent-slack/main/install.sh - DO NOT USE without thorough review
Audit Metadata
Risk Level
HIGH
Analyzed
May 5, 2026, 07:03 AM