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

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

$ 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.

Permission denied (requires tier.pro)

Sign in to access full writeups

$sign in

$ grep --similar

Similar writeups

[web][Pro]Lab 236 — PulseAlert — Blind SSTI via Notification Template Engine— hackadvisor
[web][Pro]Lab 172 — PulseGuard — Insecure Deserialization via JSON.NET TypeNameHandling— hackadvisor
[web][Pro]Lab 213 — PingCraft — SSTI via Template Preview Rendering— hackadvisor
[web][Pro]Lab 54 — PulseGuard — RCE via node:vm Sandbox Escape— hackadvisor
[web][Pro]Lab 256 — UptimeRadar — SSRF via URL Health Check— hackadvisor