hunt-springboot SKILL.md skillA
hunt-springboot from novaestellar/novahaku is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add novaestellar/novahaku/hunt-springboot@git:20260910.546fe86Pins git:20260910.546fe86 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- novaestellar/novahaku
- Path
testing/hunt/hunt-springboot/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260910.546fe86, committed Sep 10, 2026
- First version recorded
- Sep 3, 2026
- Size
- 9,357 bytes
- Repository stars
- 28
- License
- MIT
Hunt Spring Boot specific vulnerabilities — Actuator endpoints (heapdump, env, loggers, mappings, shutdown), Spring Expression Language (SpEL) injection → RCE, H2 console RCE, Jolokia JMX exposure, Spring4Shell (CVE-2022-22965), Spring Cloud Function SPEL (CVE-2022-22963), heap dump credential extraction. Use when target runs Spring Boot — detected via X-Application-Context header, /actuator, Whitelabel Error Page, or Java stack traces.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# HUNT-SPRINGBOOT — Spring Boot Specific Vulnerabilities ## Crown Jewel Targets Spring Boot Actuator `/actuator/heapdump` exposed = heap dump with all secrets in memory. **Highest-value findings:** - **`/actuator/heapdump`** — full JVM heap dump contains plaintext passwords, tokens, DB credentials, private keys stored anywhere in memory - **`/actuator/env`** — lists all environment variables and Spring properties including secrets - **`/actuator/shutdown`** — POST → shuts down the application (Critical availability impact) - **H2 Console (`/h2-console`)** — in-memory DB admin UI → SQL query execution → potential RCE via `CREATE ALIAS` trick - **SpEL injection** — Spring Expression Language in template fields, `@Value` annotations, SpEL-processed request params → RCE - **Spring4Shell CVE-2022-22965** — Spring Framework < 5.3.18 + Tomcat → RCE via data binding --- ## Phase 1 — Fingerprint Spring Boot ```bash # Spring Boot indicators curl -sI https://$TARGET/ | grep -i "x-application-context\|x-content-type" curl -s "https://$TARGET/nonexistent" | grep -i "Whitelabel Error Page\|Spring Boot\|org.springframework" # Actuator root (may list available endpoints) …
Read the whole file at its exact version.
How to install
mdr add novaestellar/novahaku/hunt-springboot@sha256:de1a0492b9bbceaeThe line at the top of this page pins the label git:20260910.546fe86, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_tjuyqkjenjhf4jfm)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Sep 3, 2026 and Sep 10, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260910.546fe86 latest | 2026-09-10 | 546fe86 | 9,357 B | A | view · diff |
| git:20260903.29924dd | 2026-09-03 | 29924dd | 9,369 B | A | view · diff |
| git:20260903.fa855c4 | 2026-09-03 | fa855c4 | 9,340 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9357 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
novaestellar/novahaku · 28 stars · license MIT · pushed 2026-09-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_tjuyqkjenjhf4jfm GET https://markdownregistry.com/api/v1/resolve?ref=novaestellar/novahaku/hunt-springboot GET https://markdownregistry.com/api/v1/blob/de1a0492b9bbceae1e18eeffc5367144ad31c502fc3368f56ace8b4c7a8e7d86
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.