To save a click, the whole post:

> Effective Immediately, all organizations using PHP for their systems are advised to be prepared for an update addressing two critical vulnerabilities. PHP is widely used for web applications. These vulnerabilities often provide a direct path to the server's file system or database. If an immediate update is not feasible, it is recommended that organizations take the system offline until it can be fully mitigated. NSA will follow up shortly with more specific guidance.

Not unexpected given the current status, but still pretty wild to see the NSA weigh in, and with such a drastic solution (taking the site offline)