Near as I can tell, the activity around the #Struts2 bug,
CVE-2024-53677, is just ham-handed runs of some generalized PoC, and nobody's actually exploiting this yet (since exploitation would be very application/path specific).
Most of the news last week was all "exploitation happening, patch and rewrite everything now!" but not seeing any reports of successful (or even possibly successful) this morning.
Tell me I'm wrong!
(The PoC identified by SANS at
https://isc.sans.edu/diary/31520 isn't specific to some particular application -- it's on the user to define upload_endpoint and assumes no auth or session or anything.)