Ku-PHP-FPM, imenenja yenqubo ye-FastCGI efakwe ekusatshalalisweni kwe-PHP okuyinhloko kusukela ngegatsha 5.3, ubungozi obubalulekile be-CVE-2021-21703 buhlonziwe, okuvumela umsebenzisi osingathayo ongenalungelo ukuthi akhiphe ikhodi enamalungelo ezimpande. Inkinga yenzeka kumaseva asebenzisa i-PHP-FPM, evame ukusetshenziswa ngokuhlangana ne-Nginx, ukusebenzisa imibhalo ye-PHP. Abacwaningi abahlonze inkinga bakwazi ukulungisa i-prototype esebenzayo yokuxhashazwa.