The Koha Release Team announced a security release on Tuesday 29 August 2017. The release fixed cross-site scripting vulnerabilities.. Releases were made for all currently supported versions of Koha: 16.05, 16.11 and 17.05. All hosted clients of CALYX were upgraded to Koha version 16.11.11 on Sunday 3 September 2017. See our Newsletter for more details.