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Sébastien Heurtematte commented on JENKINS-13138: ------------------------------------------------- I was able to isolate the main problem. It's due to another plugin : HTML5 Notifier Plugin which breaks CSRF protection. There is an active bug about this problem : JENKINS-13038 You can reproduce with these steps : - plugin mantis and html5 notifier in jenkins plugin directory - activate CSRF protection with "Default Crumb Issuer" - test verify action > Verify action doesn't work with CSRF option > ------------------------------------------- > > Key: JENKINS-13138 > URL: https://issues.jenkins-ci.org/browse/JENKINS-13138 > Project: Jenkins > Issue Type: Bug > Components: mantis > Affects Versions: current > Environment: Debian x64 > Reporter: Sébastien Heurtematte > Assignee: sogabe > Priority: Minor > Labels: csrf, mantis > Attachments: mantis.jpg > > > Etat HTTP 403 - No valid crumb was included in the request -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.jenkins-ci.org/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira