[SOLVED] Error 403 page on editing profile

When I try to edit any profile I get this message:

Forbidden

You don't have permission to access /.../index.php/component/comprofiler/saveuseredit on this server.

Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.

And after 2 or 3 tryings, my IP becomes blocked at my host (I can't access any of my sites, including Cpanel).

Note that the path showed at the page error is not correct:
.../component/comprofiler/saveuseredit
The correct should starts with "components" in the plural, not singular.
.../components/comprofiler/saveuseredit
But the directory doesn't exists anyway.

Configurations are right, there is no moderation at any profile edition.
Have no more ideas what to do.
Any help?

Sounds like mod_security false positive. Contact your host and have them make exceptions to the mod_security rules or you maybe able to do so your self if you've access to cpanel.

Thanks for answering!
Yes, you're right, I tested this by disabling mod_security. After that, I could load the avatar file.
But I can not keep it off.
This is the error log:

Pattern match "(asfunction|data|javascript|livescript|mocha|vbscript):" at ARGS:avatar__file_image_data

I do not have access to mod_security, and I very much doubt that my host service will make any modifications for me.
So my question is:
Is there any other way to make it work, other than handle mod_security?
Something as an exception for a .htaccces file, for example?

You need to contact your host to make rule exceptions if you've no access to do that your self. You likely have access to do that your self given they allow you to disable mod_security entirely. Their pattern is a bit strict rejecting post variables with the word data in them. All of this you'll need to work out with your host.

Ok!
Thank you!
I simply give up.
My host service says they cannot do nothing to help me.
The Community Builder seems to be inaccessible to make changes.
So, i giveup.
Thank you, anyway!

Then you may want to change hosts. They should be able to make a relatively simple mod_security exemption rule. Unfortunately there's nothing CB can do about this as it's a security feature at the server level.