404 on proxy JS on version 2.5.4

Hi,

okay, I had a problem with the non existent JS in the uploads dir.

I remember having deleted that ambiguous file when i was doing some security hardening a month ago.
some hash-named JS file in uploads dir looks suspicious.

i could now switch on and off several times the proxy setting and a hash-named JS file got created again. (on both version 2.5.0 and 2.5.4, i previously rolled back now i am up again)

so permissions to create that file are mostly fine.

i tested the URL param ?plausible_proxy=1 with inactive proxy setting in WP. but that didnt created the JS file as it seems. 404 again.

BUT still what i have with active proxy setting are 500 errors on POST request. they contain tracking payload.

https://my-domain.de/wp-json/19d094/v1/adc7/e5f4c29c

i guess its something with permission and security?!
i temporarily deactivated caching plugins and security plugins without any luck.

• This reply was modified 4 weeks, 1 day ago by andrekelling.

Hey,

that makes totally sense with the hiding.
And yes there is a message informing about that!
But remembering that is another tough thing to do.

500 errors are always logged in your PHP error log. Could you look up the related error and share it here?

Okay, i never worked with the WordPress error log.
Luckily my hosting provider has a nice error log UI and i dont need to set up anything around that.

I found a Fatal PHP Error! Which I really did not expect to have something to do with that.
Also i wasn’t recognized that anywhere else, all other things seemed to continue to work fine.

There is a location in the code where class MyCustomField extends acf_field acf_field class gets extended.
So its depending on the famous ACF plugin. Everything was working fine with that but somehow not when the REST call was made, i assume.

I fixed by just skipping that code with:

// If ACF isn't active for some reason, fail gracefully.
if (!class_exists('acf_field')) {
  return;
}

So actually it started with one problem and turned into another.

So thank you for helping me out that fast with your good ideas and remote debugging skills!