At the end of March we took a look at Drupal’s usage statistics and found that two months after new versions of Drupal 6 & 7, which included security updates, were released only 33 percent of Drupal 7 websites were running the latest version and only 19 percent of Drupal 6 websites were running the latest version. That obviously isn’t what you would like to see if you care about security.
It has now been two months since another set of security updates, 6.31 and 7.27, have been released. The percentage of websites that have updated to at least those versions isn’t much different from what we saw with the last set of updates. 29 percent of Drupal 7 websites are running at least 7.27 and 17 percent of Drupal 6 websites are running 6.31.
For those interested we have graphed the percentage of websites that have been upgraded over time:
For both Drupal 6 & 7 the graphs show that during the first two weeks after a new version is released there is pretty quick uptake and then it slows down.
With drupal.org still running 7.27 a month after 7.28 was released that might indicate that the upgrade process could be improved:
With our Up to Date? Chrome app you can keep track of the Drupal versions (as well other web apps) on all of the websites you manage in one place, so you can easily check if they are in need of an upgrade.