This is driving me nuts. After 10+ years of no malware on client sites, I'm getting hacked every couple of weeks on sites that are fully up to date and using 2fa logins. The common thread is that all infections install a malware plugin called wp-flare. Beyond that, I can't find any intrusion path. It does seem that once the infection gets cleaned up, it doesn't come back, but it's driving me crazy not knowing how it's getting in to multiple sites on different hosting. Anyone seen it?