Tigase XMPP Server before 5.1.0 does not verify that a request was made for an XMPP Server Dialback response, which allows remote XMPP servers to spoof domains via a (1) Verify Response or (2) Authorization Response.Referenceshttp://xmpp.org/resources/security-notices/server-dialback/https://exchange.xforce.ibmcloud.com/vulnerabilities/77985https://projects.tigase.org/projects/tigase-server/repository/revisions/2953/diffhttp://www.tigase.org/content/finally-version-510-final-available
