Orchard CMS 1.7.3/1.8.2/1.9.0 – Persistent Cross-Site Scripting
----------------- Background ----------------- Orchard is a free, open source, community-focused content management system written in ASP.NET platform using the ASP.NET MVC framework. Its vision is to create shared components for building ASP.NET applications and extensions, and specific applications that leverage these components to meet the needs of end-users, scripters, and developers. ------------------------ Software Version ------------------------ The version of Orchard affected by this issue are 1.7.3, 1.8.2 and 1.9.0. Version below 1.7.3 are not affected --------------- Description --------------- A persistent XSS vulnerability was discovered in the Users module that is distributed with the core distribution of the CMS. The issue potentially allows elevation of privileges by tricking an administrator to execute some custom crafted script on his behalf. The issue affects the Username field, since a user is allowed to register a username containing potentially dangerous characters. More information can be found here http://docs.orchardproject.net/Documentation/Patch-20150630 ---------------------- Proof of Concept ---------------------- 1. Attacker registers a new user account with username e.x <script>alert("XSS")</script> 2. The administrator attempts to delete the account using the Users core module. 3. Once the administrator clicks on the "delete" action, the XSS payload is executed. ------------- Mitigation ------------- See http://docs.orchardproject.net/Documentation/Patch-20150630 ----------- Timeline ----------- 2015-06-10 Vulnerability reported to Orchard CMS development team 2015-06-12 Response and issue verification 2015-06-30 Update and patch release 2015-07-06 Public Disclosure --------- Credits --------- Reported by Paris Zoumpouloglou of Project Zero labs (https://projectzero.gr) -- Paris Zoumpouloglou @pzmini0n https://projectzero.gr |