The problem was linked to Laravel, a popular web application framework for PHP open source. The software provides a debug mode, which allows developers to identify bugs and errors on their websites. It should be allowed during development only, but many developers have neglected to deactivate it once their website is live. The Trump campaign, which was approached by SecurityWeek, reported that the issue had been solved and that nothing was in danger. It took approximately five days for the campaign of the US president to resolve the issue.”]
Source: https://hackercombat.com/hackers-can-hijack-trump-email-server-campaign-researchers/