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If you self-host and run PHP on it (which is very likely) you NEED to update it later today, ASAP. A major vulnerability that affects PHP versions since 5 has been found, which allows remote code execution (very bad). You MUST retweet and share with friends who self-host. THIS IS CRITICAL. ⚠️

ETA for an update is Wednesday, October 21 at 14:00 UTC. If you don't understand what all this means, or if it affects your site, ask a technical friend who can help. You CANNOT afford to leave this unattended. Even if I am blowing this out of proportion, the risk is there and not worth ignoring.

Hi from person staying up late to deal with this. I'm very tired.