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Diffstat (limited to 'doc/user/project/pages/index.md')
| -rw-r--r-- | doc/user/project/pages/index.md | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/doc/user/project/pages/index.md b/doc/user/project/pages/index.md index 6c3b911d033..4f389716f08 100644 --- a/doc/user/project/pages/index.md +++ b/doc/user/project/pages/index.md @@ -124,3 +124,24 @@ If you are running a self-managed instance of GitLab (GitLab Community Edition a [follow the administration steps](../../../administration/pages/index.md) to configure Pages. <i class="fa fa-youtube-play youtube" aria-hidden="true"></i> Watch a [video tutorial](https://www.youtube.com/watch?v=dD8c7WNcc6s) about how to get started with GitLab Pages administration. + +## Security for GitLab Pages + +If your username is `foo`, your GitLab Pages website is located at `foo.gitlab.io`. +GitLab allows usernames to contain a `.`, so a user named `bar.foo` could create +a GitLab Pages website `bar.foo.gitlab.io` that effectively is a subdomain of your +`foo.gitlab.io` website. Be careful if you use JavaScript to set cookies for your website. +The safe way to manually set cookies with JavaScript is to not specify the `domain` at all: + +```javascript +// Safe: This cookie is only visible to foo.gitlab.io +document.cookie = "key=value"; + +// Unsafe: This cookie is visible to foo.gitlab.io and its subdomains, +// regardless of the presence of the leading dot. +document.cookie = "key=value;domain=.foo.gitlab.io"; +document.cookie = "key=value;domain=foo.gitlab.io"; +``` + +This issue doesn't affect users with a custom domain, or users who don't set any +cookies manually with JavaScript. |