mpersinger

Hello,

I’m not sure why this topic is listed as Resolved? It sounds like there will be a Bug Fix released for W3 Total Cache but nothing has been released yet. Is that correct?

We run W3 Total Cache on all of our sites and I have this error on 10 WP sites now.

Fatal error: Uncaught W3TC\Util_WpFile_FilesystemOperationException

I could not roll back the plugin I had to deactivate W3 Total Cache to get past this issue.

Thanks
Monte

-Sometimes if you just reload the error pages a few times it resolves itself.

-Or if you change the URL in the address bar and change it back to /wp-admin/ and reload sometimes the dashboard admin page will reload.

-Or if you click the back button and reload sometimes you can get to the admin dashboard and past the error screen.

Most of the time I can do the 3 things above and still get to the WP admin dashboard even though there is some kind of WP error.

If none of these things work you would need to deactivate all of the plugins to get it to load normally. You can do that by renaming the plugin directory to plugin2 or whatever.

I don’t think you really need the email link to fix it and get logged into WordPress admin.

Sometimes I login, get the error, then just switch my URL to website.com/wp-admin/ and refreash reload and I get logged in.

Sometimes I rename the plugins directory to plugins2 and login. This deactivates every WordPress plugin and you can login.

It is normally a plugin issue. One plugin on your site that is causing issues. The Apache error log or Nginx error log should tell you what the problem is.

we manage a couple hundred wordpress sites and this new feature is causing us a lot of pain. The admin email a lot of times is not set to us. So we are getting locked out of wordpress. We are running on PHP 7.3 and it is likely a plugin issue with PHP 7.3 but the error log files are not giving us any clues because we can’t get into the admin which would generate some error log files normally.

If you are trying to get the email link you can just add this to the end of your wordpress domain name:
/wp-login.php?action=entered_recovery_mode

The email link is just a simple link with that added to the end of it.

I’ve noticed a lot of cache issues with chrome as well. If you end up at wp-login.php page and site won’t load try switching your URL to /wp-admin/

The plugin trick works. Re name plugin directory to plugins2 or whatever. That will force WP to deactivate all plugins and then you can login. Then switch plugins2 back to plugins and you can enable your plugins again. And try to figure out which one caused the issue.

This definitely looks like the culprit good find on this one thank you
https://blog.sucuri.net/2017/02/content-injection-vulnerability-wordpress-rest-api.html

The only WP sites I have seen this hack on are running 4.7.0 or 4.7.1. 4.7.2 resolves the vulnerability. Sounds like the hack was created by the release of 4.7

Thanks for the help I had the same issue and now it is fixed. It was definitely W3 Total Cache causing the issue. Every time I upgraded WordPress to 4.7 it would run halfway thru the updates and then choke on the database upgrade and throw this error

PHP Fatal error: Call to undefined function wp_cache_get() in /wp-includes/option.php on line 1123, referer: /wp-admin/upgrade.php?step=upgrade_db

I tried deactivating W3TC and upgrading but same result. Admin will not load. Frontend working normal but admin stuck and won’t load.

As soon as I deleted /wp-content/w3tc-config/ everything started working again.
I didn’t have to remove W3TC all I had to do was delete this one directory. After I got everything upgraded I turned W3TC back on and had no problems.