ISSUE DESCRIPTION There are multiple issues. 1. Updates to the XAPI database sanitise input strings, but try generating the notification using the unsanitised input. This causes the database's event thread to terminate and cease further processing. 2. XAPI's UTF-8 encoder implements v3.0 of the Unicode spec, but XAPI uses libraries which conform to the stricter v3.1 of the Unicode spec. This causes some strings to be accepted as valid UTF-8 by XAPI, but rejected by other libraries in use. Notably, such strings can be entered into the database, after which the database can no longer be loaded. 3. There is no input sanitisation for Map/Set updates on objects in the XAPI database. IMPACT Buggy or malicious inputs to XAPI can cause a Denial of Service. VULNERABLE SYSTEMS All versions of XAPI are believed to be vulnerable. Issues 1 and 2 can be leveraged by guest administrator. Issue 3 can only be leveraged by an authenticated API…Read More