Oracle warned its corporate customers that there is a critical-rated vulnerability in its PeopleSoft software, which is used by large companies to manage payroll and human resources, a day after a cybercrime group took credit for abusing the flaw as part of a mass-hacking campaign. The company published the security advisory on Thursday after the hacking group ShinyHunters claimed to have breached more than 100 organizations that use PeopleSoft servers. Mandiant, the Google-owned security unit t...