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Lab 247 — PulseGuard — SSTI in Webhook Notification Templates

hackadvisor

Task: Express.js uptime monitoring platform with Liquid template support in webhook notifications. Solution: SSTI via LiquidJS include tag to read /proc/self/environ and extract FLAG from environment variables.

lfi ssti nodejs express webhook template_injection liquidjs uptime_monitoring

ssti_liquidjslfi_via_include_tagproc_environ_disclosure

$ ls tags/ techniques/

lfi ssti nodejs express webhook template_injection liquidjs uptime_monitoring

ssti_liquidjslfi_via_include_tagproc_environ_disclosure

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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