WP Super Cache is a full page caching plugin for WordPress.
Version 1.6.9 has just been released and is a required upgrade for all users as it resolves a security issue in the debug log. The issue can only be exploited if debugging is enabled in the plugin which will not be the case for almost all users.
The debug log is usually only enabled temporarily if a site owner is debugging a caching problem and isn’t something that should be left on permanently as it will slow down a site.
If there is an existing debug log it will be deleted after updating the plugin.
This release also improves the debug log by hiding sensitive data such as the ABSPATH directory of the WordPress install and login cookies. Unfortunately in the past users have copied the log file data into forum posts. A warning message has been added asking the site owner not to publish the debug log.
Details of the security issue will be added to this post in time to allow sites to update their plugin.