Individual skill

web-ssrf-gopher-redis-rce

Turn a server-side request (SSRF) into RCE by speaking the Redis protocol over gopher:// to an internal, unauthenticated Redis — write a cron job, an SSH key, or a webshell. Load when: SSRF is confirmed (URL fetch, webhook, PDF/URL preview, image proxy) AND an internal Redis/6379 (or similar line-protocol service) is reachable. Authorized targets only.

skills/web/web-ssrf-gopher-redis-rce/SKILL.md

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Last checked: Nov 7, 2026

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Repository stars (not skill ratings): 27
Repository last updated: Oct 14, 2026
License: MIT

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SKILL.mdcore · 3,966 bytes

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# SSRF → internal Redis → RCE via gopher://

## When it applies
- You have a confirmed **SSRF**: the app fetches a URL you control (webhook, "import from
  URL", link preview, avatar-by-URL, headless PDF, XXE-to-SSRF), and it will follow
  `gopher://` (curl-backed fetchers commonly do).
- An **internal Redis** is reachable from the app host (`127.0.0.1:6379` or a Docker
  service) and is **unauthenticated** (default) or you know the password.

## Why it works
Redis speaks a simple newline/inline text protocol. `gopher://` lets you send **arbitrary
raw bytes** to a TCP port, so you can pipeline real Redis commands through the SSRF.
Redis can write files (`CONFIG SET dir` + `dbfilename` + `SAVE`), so you overwrite a file
that gets executed: a cron job, `~/.ssh/authorized_keys`, or a web-root PHP file.