ssti-hunter

ssti-hunter is an agent for Claude Code from H-mmer/pentest-agents. It costs 83 tokens per session (4,972 once invoked), scanned A, original, no licence file.

An agent for testing server-side template injection (SSTI), where user-controlled text is interpreted as a server-side template instead of ordinary content. It covers several template systems, including Jinja2, Twig, Velocity, FreeMarker, ERB, Handlebars, and Thymeleaf.

In plain words
What is it for?
Use it on rule engines, comments or messages, pull-request automation, admin templates, and other user-customisable template surfaces.
Why use it?
It helps test customisable templates and rendering features for unsafe interpretation, including attempts to bypass input filters and distinguish parsing from runtime behaviour.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Good fit Use it on rule engines, comments or messages, pull-request automation, admin templates, and other user-customisable template surfaces.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/h-mmer/pentest-agents/ssti-hunter
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/H-mmer/pentest-agents

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ssti-hunter

README.md
[![agentmods](https://agentmods.dev/badge/agents/h-mmer/pentest-agents/ssti-hunter/github.svg)](https://agentmods.dev/agents/h-mmer/pentest-agents/ssti-hunter)
Your own site
<a href="https://agentmods.dev/agents/h-mmer/pentest-agents/ssti-hunter"><img src="https://agentmods.dev/badge/agents/h-mmer/pentest-agents/ssti-hunter/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for ssti-hunter

Your own site · 80×15
<a href="https://agentmods.dev/agents/h-mmer/pentest-agents/ssti-hunter"><img src="https://agentmods.dev/badge/agents/h-mmer/pentest-agents/ssti-hunter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 83 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,972 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00083 $0.04972
Opus 5 $0.00042 $0.02486
Sonnet 5 $0.00017 $0.00994
Haiku 4.5 $0.00008 $0.00497

Measured 9d ago against content hash f447181657d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

ssti-hunter scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

The F5 rule is **start-anchored on the literal `${`** after URL-decoding once. Validated bypass primitives (raw-socket verified 2026-05 against banking-grade F5 ASM deployment — see `rules/payloads.md` "F5 BIG-IP ASM Byp
.claude/agents/ssti-hunter.md · 372 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 372 lines · 83 tokens per session scan A f447181657d7

Subscribe to this mod's changes

ssti-hunter is an agent published in the GitHub repository H-mmer/pentest-agents (836 stars, last pushed 2mo ago), with no licence file. It adds 83 tokens to every session and 4,972 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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