The vulnerability of Ubuntu operating systems and Debian GNU/Linux allows a perpetrator to inject any web or HTML code they desire.

The vulnerability of the GUI editor MoinMoin in Ubuntu and Debian GNU/Linux operating systems exists due to the lack of measures taken to protect the structure of the web page. Exploiting this vulnerability allows a malicious actor to inject arbitrary Web or HTML code remotely...

CVE-2016-9119

Cross-site scripting XSS vulnerability in the link dialogue in GUI editor in MoinMoin before 1.9.8 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors...