26 Jul 2019

Closures of Very Popular WordPress Plugins, Week of July 26

While we already are far ahead of other companies in keeping up with vulnerabilities in WordPress plugins (amazingly that isn’t an exaggeration), in looking in to how we could get even better we noticed that in a recent instance were a vulnerability was exploited in a plugin, we probably could have warned our customers about the vulnerability even sooner if we had looked at the plugin when it was first closed on the Plugin Directory instead of when the vulnerability was fixed (though as far as we are aware the exploitation started after we had warned our customers of the fix). So we are now monitoring to see if any of the 1,000 most popular plugins are closed on the Plugin Directory and then seeing if it looks like that was due to a vulnerability.

This week two of those plugins were closed and both of them have not been reopened. [Read more]

26 Jul 2019

Authenticated Persistent Cross-Site Scripting (XSS) Vulnerability in Facebook Widget (Widget for Facebook Page Feeds)

The plugin Facebook Widget (Widget for Facebook Page Feeds) was closed on the WordPress Plugin Directory yesterday. That is one of the 1,000 most popular plugins, so we were alerted to its closure. While we were looking in to the plugin to see if there were any vulnerabilities we should be warning users of the plugin that also use our service, we found that it contains an authenticated persistent cross-site scripting (XSS) vulnerability due to not properly handling the security of shortcode attributes.

The plugins shortcode “fb_widget” causes the function fb_plugin_shortcode() to run. That function is located in the file /short_code.php: [Read more]