Cross-site scripting (XSS) vulnerability in Movable Type before 2.6, and possibly other versions including 2.63, allows remote attackers to insert arbitrary web script or HTML via the Name textbox, possibly when the "Allow HTML in comments?" option is enabled.

The password reset feature in Movable Type before 3.2 generates different error messages depending on whether a user exists or not, which allows remote attackers to determine valid usernames.

Cross-site scripting (XSS) vulnerability in Movable Type before 3.2 allows remote attackers to inject arbitrary web script or HTML via the (1) title, (2) category, (3) body, (4) extended body, and (5) excerpt form fields in new blog entries.

mt-comments.cgi in Movable Type before 3.2 allows attackers to redirect users to other web sites via URLs in comments.

Six Apart Movable Type 3.16 allows local users with blog-creation privileges to create or overwrite arbitrary files of certain types (such as HTML and image files) by selecting an arbitrary directory as a blog's top-level directory. NOTE: this issue can be used in conjunction with CVE-2005-3102 to create or overwrite arbitrary files of all types.