phpWhois allows remote attackers to execute arbitrary code via a crafted whois record.
blog.nettitude.com/uk/cve-2015-5243-phpwhois-remote-code-execution
github.com/Gemorroj/phpwhois/commit/91c937e03c876ba1290b6de2a3ad953d2105fdd0
github.com/jsmitty12/phpWhois/blob/master/CHANGELOG.md
github.com/jsmitty12/phpWhois/issues/19
github.com/sbaresearch/advisories/tree/public/2018/SBA-ADV-20180425-01_phpWhois_Code_Execution
github.com/sparc/phpWhois.org/commit/5cc572490c9053d46598ec9348a11e36a5a33a46#diff-f150ae17da7341bf6c2eff928684b3a3