Not a developer? Go to


MT 4.23 is now out

By Chris Ernest Hall
Posted December 3, 2008, in News.

In case you missed the announcement post on, yesterday evening we released Movable Type 4.23. Much thanks to the community members who submitted bug reports and code patches that contributed to this release. More details can be found on the change log, or you can just use the following direct download links to get MTOS 4.23:

Please note that this is a mandatory security upgrade due to the fixes for XSS vulnerabilities that it includes.



Michael on December 4, 2008, 1:27 a.m. 返信

Installing MT 4.23 downgraded the StyleCatcher plugin from 2.2 to 2.1, breaking the Sandbox template set plugin. Reinstalling the 2.2 version of the plugin, seems to have restored the lost functionality.

Abby Van Buren

Abby Van Buren on December 15, 2008, 4:15 p.m. 返信

I just upgraded my companies blog and had no problems, it was as smooth of a process as upgrading can be!


eadstudios on February 6, 2009, 9:26 a.m. 返信

Good god, where the hell are the custom fields (Pro) version of this damn thing! I have searched the site for hours and every time a new version gets released you guys seem to make it harder to find the things I actually need!

Majid Hashemi

Majid Hashemi on February 19, 2009, 6:56 p.m. 返信

Very smooth upgrade, I had to share:


Carlos A. Cabrera

Carlos A. Cabrera on May 2, 2009, 5:10 p.m. 返信

Did you have any luck finding out about the Custom Fields? Because I haven’t


Sally on July 31, 2012, 10:40 a.m. 返信

You should have found them on the pack. However, the problem is already solved many months from now, because the next update gave the answer

Carmen Jones

Carmen Jones on September 10, 2012, 10:38 a.m. 返信

A great team supported by the community. This is the reason behind Moveable type’s success.


MichaelCreevy on October 9, 2012, 5:50 a.m. 返信

Custom Fields are usually in the pack and not only when it comes to this version..


Webster on October 29, 2012, 12:59 a.m. 返信

Thanks Michael :) It is always such annoying to upgrade, but to understand that some plugins need additional work.


RobertG on November 15, 2012, 6:01 a.m. 返信

Hi Abby. May I ask you something. Do you use a beta version to your company’s blog? Isn’t it too dangerous because there might be many security related bugs in the platform?

David Fox

David Fox on November 25, 2012, 11:57 a.m. 返信

I am so happy that I have this here.


Racquel on November 26, 2012, 12:32 a.m. 返信

What kind of security issues had been fixed with this release. I am interested because I do some king of library of viruses and other bad stuff with explanations how to fix them.


Danika on December 19, 2012, 8:47 a.m. 返信

Hi, is it possible to say more about XSS vulnerabilities. What kind of problem this could cause to our sites? Thank you in advance.