It is a nmap script for GravCMS vulnerability (CVE-2021-21425)
USAGE
-- nmap -p443 --script grav_cms.nse
-- PORT STATE SERVICE
-- 443/tcp open https
-- | grav_cms:
-- | VULNERABLE:
-- | GravCMS (CVE-2021-21425)
-- | State: VULNERABLE (Exploitable)
-- | IDs: CVE:CVE-2021-21425
-- | GravCMS Unauthenticated Arbitrary YAML Write/Update leads to Code Execution
-- | Disclosure date: 2021-03-19
-- | References:
-- |_ https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21425