Hello all!
I have a wiki (Mediawiki v1.35.1) that works when unframed – that is, when not embedded as an iframe.
When iframed, the wiki login form:
…works with:
Firefox, 85.0 Linux
Firefox, 86.0 Windows
…and does NOT work with:
Chrome, 89.0 Windows
“Not working” means authentication is blocked and this error is displayed:
There seems to be a problem with your login session; this action has been canceled as a precaution against session hijacking. Please resubmit the form."