WordPress Processing Embed Plugin 'pluginurl' Parameter Cross Site Scripting Vulnerability

Summary
This host is installed with WordPress Processing Embed Plugin and is prone to cross-site scripting vulnerability.
Impact
Successful exploitation will allow attackers to execute arbitrary web script or HTML in a user's browser session in the context of an affected site. Impact Level: Application
Solution
No solution or patch was made available for at least one year since disclosure of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer release, disable respective features, remove the product or replace the product by another one.
Insight
The flaw is due to input validation error in 'pluginurl' parameter to 'wp-content/plugins/wordpress-processing-embed/data/popup.php', which is not properly sanitised before being returned to the user.
Affected
WordPress Processing Embed version 0.5
References