An agency that monitors the PHP programming language issued a severe warning on Tuesday that it had identified two major cybersecurity vulnerabilities. Fixes should have been deployed on Wednesday at 10 a.m. ET, but security experts are urging website administrators to take immediate notice and precautions.

The warnings are unusually severe, rated 9.2 out of 10. On Wednesday afternoon, PHP released some technical details about the two exploits. They allow bad actors to run malicious code on a site’s web servers. The very best thing you can do to keep your website safe is to immediately install the latest version of PHP. Older versions of PHP that have been sunsetted are also getting an emergency update with the patches.

PHP is a free, open-source programming language that much of the web is built on. According to the Wall Street Journal , 70% of the world’s websites could be vulnerable.…