BillForge

hackadvisor

Task: Invoicing platform (BillForge) with wkhtmltopdf-based PDF export where notes field is rendered as raw HTML in PDF but escaped in web view. Solution: Injected iframe pointing to http://localhost:3001/flag in notes field, exploiting SSRF via wkhtmltopdf to access internal flag service.

flask ssrf wkhtmltopdf nginx internal_service html_injection iframe honeypot_flag pdf_export invoicing

ssrf_via_wkhtmltopdfinternal_service_accessanti_honeypot_awarenesshtml_injection_in_pdflocalhost_ipv6_bypassdifferential_rendering

$ ls tags/ techniques/

flask ssrf wkhtmltopdf nginx internal_service html_injection iframe honeypot_flag pdf_export invoicing

ssrf_via_wkhtmltopdfinternal_service_accessanti_honeypot_awarenesshtml_injection_in_pdflocalhost_ipv6_bypassdifferential_rendering

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]BillForge — SSRF Chain via Chromium PDF Invoice Generation— hackadvisor
[web][Pro]BillForge — LFI to RCE via Nginx Log Poisoning— hackadvisor
[web][Pro]Lab 25 — DocuForge — RCE via Dompdf Font Cache Exploitation— hackadvisor
[web][Pro]Lab 58 — ReportForge — SSRF via PDF Export Logo URL— hackadvisor
[web][Pro]Lab 197 — BillForge — Authorization Bypass via HTTP Parameter Pollution— hackadvisor