In general, Ember.js escapes or strips any user-supplied content before inserting it in strings that will be sent to innerHTML. However, the `tagName` property of an `Ember.View` was inserted into such a string without being sanitized. This means that if an application assigns a view's `tagName` to user-supplied data, a specially-crafted payload could execute arbitrary JavaScript in the context of the current domain ("XSS"). This vulnerability only affects applications that assign or bind user-provided content to `tagName`.

Ember.js 1.0.x before 1.0.1, 1.1.x before 1.1.3, 1.2.x before 1.2.1, 1.3.x before 1.3.1, and 1.4.x before 1.4.0-beta.2 allows remote attackers to conduct cross-site scripting (XSS) attacks by leveraging an application that contains templates whose context is set to a user-supplied primitive value and also contain the `{{this}}` special Handlebars variable.

Ember.js 1.0.x before 1.0.1, 1.1.x before 1.1.3, 1.2.x before 1.2.1, 1.3.x before 1.3.1, and 1.4.x before 1.4.0-beta.2 allows remote attackers to conduct cross-site scripting (XSS) attacks by leveraging an application using the "{{group}}" Helper and a crafted payload.

Cross-site scripting (XSS) vulnerability in the link-to helper in Ember.js 1.2.x before 1.2.2, 1.3.x before 1.3.2, and 1.4.x before 1.4.0-beta.6, when used in non-block form, allows remote attackers to inject arbitrary web script or HTML via the title attribute.

Cross-site scripting (XSS) vulnerability in Ember.js 1.10.x before 1.10.1 and 1.11.x before 1.11.2.

Cross-site scripting (XSS) vulnerability in Ember.js 1.8.x through 1.10.x, 1.11.x before 1.11.4, 1.12.x before 1.12.2, 1.13.x before 1.13.12, 2.0.x before 2.0.3, 2.1.x before 2.1.2, and 2.2.x before 2.2.1 allows remote attackers to inject arbitrary web script or HTML.