Individual skill
ssti
Hunt server-side template injection across Jinja2/Twig/Freemarker/Velocity/Handlebars and validate progression from expression injection to code execution.
packages/decepticon/decepticon/skills/standard/analyst/ssti/SKILL.md
Source commit df879550544d36b6b1e69062f05adae28537adf2
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- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 9, 2026
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Repository context
- Repository stars (not skill ratings)
- 6,568
- Repository last updated
- Nov 7, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
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- engineering Derived category
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# SSTI Playbook
## High-signal checks
- Look for template rendering with user input in `render_template_string`, `Template(...)`, `twig->createTemplate`, `Freemarker Template.process`.
- Confirm user-controlled payload reaches a template context key or template source string.
## Fast probes
- Jinja2: `{{7*7}}`, `{{config}}`, `{{request}}`
- Twig: `{{7*7}}`, `{{_self}}`
- Freemarker: `${7*7}`
- Velocity: `#set($x=7*7)$x`
## Escalation path
1. Detect expression evaluation.