Pivotal Apps Manager included in Pivotal Application Service, versions 2.2.x prior to 2.2.1 and 2.1.x prior to 2.1.8 and 2.0.x prior to 2.0.17 and 1.12.x prior to 1.12.26, does not escape all user-provided content when sending invitation emails. A malicious authenticated user can inject content into an invite to another user, exploiting the trust implied by the source of the email.