Cross-site scripting (XSS) vulnerability in models/issue.go in Gogs (aka Go Git Service) 0.3.1-9 through 0.5.x before 0.5.8 allows remote attackers to inject arbitrary web script or HTML via the text parameter to api/v1/markdown.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.