Confluence Plugin UI form action runs into 403 error

[Sascha Heyer]

Hi Confluence Folks,

we upgraded our Confluence to 7.3.1 and it seems our plugins are not working anymore. 

The installation works fine but the form action which is supposed to start our plugin runs into a 403 error. 

We have a velocity template with a very basic form including a submit action.

<form class="aui long-label" action="start.action" method="post">
<div class="field-group viewMode">
<span class="field-value"><input type="submit" value="Start" class="button"/></span>
</div>
</form>

Is there any known issues? Any changes which are not part of the migration guide or release notes?

Best regards
Sascha

[Fabian Lim]

Hi Sasha,

Could you let me know a few things about the issue? 

1. Are any other users having trouble accessing Confluence? Do you have the same problem on multiple devices or computers?
2. Which browser are you using, and does this occur on more than one browser?
   • Have you been able to test this after clearing your browser cache?
   • Does this occur in incognito mode?
3. 403s can indicate an issue with authentication. Can you let me know how are you logging in?
   • Are you using a bookmark or a password manager or some other authentication site (e.g. Okta)?

Thank you for your help!