ssti
Hunt server-side template injection across Jinja2/Twig/Freemarker/Velocity/Handlebars and validate progression from expression injection to code execution.
63
Quality
75%
Does it follow best practices?
Run evals on this skill
Adds up to 20 points to the overall score
View guide
Securityby
Critical
Do not install without reviewing
Fix and improve this skill with Tessl
tessl review fix ./packages/decepticon/decepticon/skills/standard/analyst/ssti/SKILL.mdSSTI 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
- Detect expression evaluation.
- Enumerate available objects and filters.
- Attempt file read / env leak.
- Attempt command execution via framework-specific gadget chain.
Validation
Use validate_finding with a positive execution signal and a benign negative control.
- Repository
- PurpleAILAB/Decepticon
- Commit
0cf691e
- Last updated
- First committed
Is this your skill?
If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.