Lab 56 — DataPulse — XXE to SSRF via SVG Avatar Upload

hackadvisor

Task: DataPulse analytics dashboard with SVG avatar upload processed server-side via libxmljs2 with entity resolution enabled. Solution: XXE injection in SVG file to read local files, discovered .env config at /app/data/.env revealing confidential report path, then read flag from /app/data/.reports/confidential.txt.

lfi file_upload nodejs config_disclosure express xxe svg xml honeypot_flag libxmljs2 sharp better_sqlite3

config_enumerationenv_file_disclosurelocal_file_readsvg_xxexxe_injection

$ ls tags/ techniques/

lfi file_upload nodejs config_disclosure express xxe svg xml honeypot_flag libxmljs2 sharp better_sqlite3

config_enumerationenv_file_disclosurelocal_file_readsvg_xxexxe_injection

Analysis

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

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