find reflected/evaluated field -> fingerprint engine -> use template expression to read env/flag or RCE -> flag.\n- FIRST PROBE: Python requests session POST step1 with {{7*7}}, follow step2/step3 forms and inspect responses.\n- ABANDON IF: all reflected fields are HTML-escaped literals and no errors/differentials across registered/authenticated pages.\n\n\n=== post step1 302 http://127.0.0.1:9100/accounts/register/step1/ len 0 loc /accounts/register/step2/ cookies {'csrftoken': 'efyvZ1YJZixq7clz4vfYW5G4F1H1UIbW', 'sessionid': 'xacofp2bcthik97ec2ljvsjint8y7bil'}\n\nforms inputs/actions:\n\n=== get redirected 200 http://127.0.0.1:9100/accounts/register/step2/ len 2021 loc None cookies {'csrftoken': 'efyvZ1YJZixq7clz4vfYW5G4F1H1UIbW', 'sessionid': 'xacofp2bcthik97ec2ljvsjint8y7bil'}\n\n\n\n
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Register - Step 2\n \n
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Step 2: Enter your Email
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\nCSRF2 kPL0bWbmY0BkjOs3DV8vRiMdti4gSt0QoU9l0NZVN8YAgQDsxgdjDdi7Y9B7C11C\ninput names ['csrfmiddlewaretoken', 'email']\n\n=== post step2 302 http://127.0.0.1:9100/accounts/register/step2/ len 0 loc /accounts/register/step3/ cookies {'csrftoken': 'efyvZ1YJZixq7clz4vfYW5G4F1H1UIbW', 'sessionid': 'xacofp2bcthik97ec2ljvsjint8y7bil'}\n\nforms inputs/actions:\n\n=== get step3 200 http://127.0.0.1:9100/accounts/register/step1/ len 2249 loc None cookies {'csrftoken': 'efyvZ1YJZixq7clz4vfYW5G4F1H1UIbW', 'sessionid': 'xacofp2bcthik97ec2ljvsjint8y7bil'}\n\n\n\n
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Register - Step 1\n \n
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Step 1: Enter your Name
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\n\n[stderr]\n/home/user/Library/Python/3.9/lib/python/site-packages/urllib3/__init__.py:35: NotOpenSSLWarning: urllib3 v2 only supports OpenSSL 1.1.1+, currently the 'ssl' module is compiled with 'LibreSSL 2.8.3'. See: https://github.com/urllib3/urllib3/issues/3020\n warnings.warn(\n\np1 302 /accounts/register/step2/ {'csrftoken': '5KtPNUEYMhXCfX6Q6ma7UzylzlfQQj8n', 'sessionid': 'dxffzofljrtz18y6hzib1fx0egk3aoxo'}\ng2 200 http://127.0.0.1:9100/accounts/register/step2/\n\n\n\n
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Register - Step 2\n \n
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