AncoraThemes Gustavo WordPress theme version 1.2.2 and earlier
Attacker manipulates file include/require parameters to load arbitrary files like /etc/passwd, /wp-config.php exposing configuration and sensitive credentials or executing malicious code.
Update AncoraThemes Gustavo to version above 1.2.2 immediately. If unavailable, deactivate theme and switch to patched alternative WordPress theme.
If output shows version number <= 1.2.2, system is vulnerable and requires immediate update. If grep returns nothing, verify theme path and WordPress installation location.
grep -i 'Version:' /var/www/html/wp-content/themes/gustavo/style.css 2>/dev/null | head -1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H