TinyMCE mXSS vulnerability in undo/redo, getContent API, resetContent API, and Autosave plugin

Impact A mutation cross-site scripting mXSS vulnerability was discovered in TinyMCE’s core undo and redo functionality. When a carefully-crafted HTML snippet passes the XSS sanitisation layer, it is manipulated as a string by internal trimming functions before being stored in the undo stack. If t...