I have a Jenkins job which generate a html page. I want to add some forms to that html page, in order to add some comments after job's execution. Is there a way for Jenkins to manage the data provided by these forms (at Submit action)?
The closest plugin I can find that does what you're asking would be this one:
https://wiki.jenkins-ci.org/display/JENKINS/Page+Markup+Plugin
But this is admittedly not quite what you asked. I would say you may need to write a script that will make the modifications ot the HTML reports that Jenkins can run after compiliation of said reports.