The parsecmd function in lib/gitlabshell.rb in GitLab 5.0 before 5.4.2, Community Edition before 6.2.4, and Enterprise Edition before 6.2.1 and gitlab-shell before 1.7.8 allows remote authenticated users to gain privileges and clone arbitrary repositories.

The groups API in GitLab 6.x and 7.x before 7.4.3 allows remote authenticated guest users to modify ownership of arbitrary groups by leveraging improper permission checks.

The (1) createbranch, (2) createtag, (3) importproject, and (4) forkproject functions in lib/gitlabprojects.rb in GitLab 5.0 before 5.4.2, Community Edition before 6.2.4, Enterprise Edition before 6.2.1 and gitlab-shell before 1.7.8 allows remote authenticated users to include information from local files into the metadata of a Git repository via the web interface.