The Jetpack plugin before 1.9 before 1.9.4, 2.0.x before 2.0.9, 2.1.x before 2.1.4, 2.2.x before 2.2.7, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.2, 2.6.x before 2.6.3, 2.7.x before 2.7.2, 2.8.x before 2.8.2, and 2.9.x before 2.9.3 for WordPress does not properly restrict access to the XML-RPC service, which allows remote attackers to bypass intended restrictions and publish posts via unspecified vectors. NOTE: some of these details are obtained from third party information.