We have several internal wikis that we maintain. We write extensions to these wikis. We are trying to convince management to upgrade our mediaWiki version to 1.23.x. At the same time we will upgrade our PHP version from 5.2.8 to 5.4.x. We have kept our PHP version to 5.2 because of the old mediaWiki version.

We are currently at mediaWiki 1.15.3. As developers we know that we are way overdue on upgrading, but no one has ever wanted to pay for it.

Some of the obvious things are:

1. Both the Media wiki version and the php version are no longer supported.

2. We do not have access to the most recent extensions.

3. Limited documentation for the old versions.

4. General security vulnerabilities. - I would love to have any specifics here.

Does anyone have any other points that I could add that would make management say yes? We have been reading about performance boasts. Any specifics?

I would also take any links that may be helpful.

Thanks,

Mary