Slack: Content Spoofing all Integrations in https://team.slack.com/services/new/

Hello There,

I’ve discovered 48+ content spoofing and confirmed all of your Integrations at https://team.slack.com/services/new/ is vulnerable to Content spoofing and exploitable to all users. Content Spoofing An attack technique used to trick a user into thinking that fake web site content is legitimate data and is an attack targeting a user made possible by an injection vulnerability in a web application. When an application does not properly handle user supplied data, an attacker can supply content to a web application, typically via a parameter value, that is reflected back to the user.

###Proof of concept:

###Buildbox: https://asdasda.slack.com/services/new/buildbox?error=Content Spoofing
###Cloud 66: https://asdasda.slack.com/services/new/cloud66?error=Content Spoofing
###Code Climate: https://asdasda.slack.com/services/new/code-climate?error=Content Spoofing
###Codeship: https://asdasda.slack.com/services/new/codeship?error=Content Spoofing
###Crashlytics: https://asdasda.slack.com/services/new/crashlytics?error=Content Spoofing
###Datadog: https://asdasda.slack.com/services/new/datadog?error=Content Spoofing
###Dropbox: https://asdasda.slack.com/services/new/dropbox?error=Content Spoofing
###Envoy: https://asdasda.slack.com/services/new/envoy?error=Content Spoofing
###Github: https://asdasda.slack.com/services/new/github?error=Content Spoofing
###GoSquared : https://asdasda.slack.com/services/new/gosquared?error=Content Spoofing
###Google Drive: https://asdasda.slack.com/services/new/gdrive?error=Content Spoofing
###Google+ Hangouts: https://asdasda.slack.com/services/new/hangouts?error=Content Spoofing
###Help Scout: https://asdasda.slack.com/services/new/helpscout?error=Content Spoofing
###Heroku: https://asdasda.slack.com/services/new/heroku?error=Content Spoofing
###Honeybadger: https://asdasda.slack.com/services/new/honeybadger?error=Content Spoofing
###Hubot: https://asdasda.slack.com/services/new/hubot?error=Content Spoofing
###IFTTT: https://asdasda.slack.com/services/new/ifttt?error=Content Spoofing
###Jira: https://asdasda.slack.com/services/new/jira?error=Content Spoofing
###Jenkins CI: https://asdasda.slack.com/services/new/jenkins-ci?error=Content Spoofing
###Librato: https://asdasda.slack.com/services/new/librato?error=Content Spoofing
###Magnum CI: https://asdasda.slack.com/services/new/magnum-ci?error=Content Spoofing
###MailChimp: https://asdasda.slack.com/services/new/mailchimp?error=Content Spoofing
###Nagios: https://asdasda.slack.com/services/new/nagios?error=Content Spoofing
###New Relic:
###Ninefold: https://asdasda.slack.com/services/new/ninefold?error=Content Spoofing
###OpsGenie: https://asdasda.slack.com/services/new/opsgenie?error=Content Spoofing
###PagerDuty: https://asdasda.slack.com/services/new/pagerduty?error=Content Spoofing
###Papertrail: https://asdasda.slack.com/services/new/papertrail?error=Content Spoofing
###Phabricator: https://asdasda.slack.com/services/new/phabricator?error=Content Spoofing
###Pingdom: https://asdasda.slack.com/services/new/pingdom?error=Content Spoofing
###Pivotal Tracker: https://asdasda.slack.com/services/new/pivotaltracker?error=Content Spoofing
###RSS: https://asdasda.slack.com/services/new/rss?error=Content Spoofing
###Raygun: https://asdasda.slack.com/services/new/raygun?error=Content Spoofing
###Reamaze: https://asdasda.slack.com/services/new/reamaze?error=Content Spoofing
###Rollcall: https://asdasda.slack.com/services/new/rollcall?error=Content Spoofing
###Runscope: https://asdasda.slack.com/services/new/runscope?error=Content Spoofing
###Screenhero: https://asdasda.slack.com/services/new/screenhero?error=Content Spoofing
###Semaphore: https://asdasda.slack.com/services/new/semaphore?error=Content Spoofing
###Sentry: https://asdasda.slack.com/services/new/sentry?error=Content Spoofing
###StatusPage.io: https://asdasda.slack.com/services/new/statuspageio?error=Content Spoofing
###Stripe: https://asdasda.slack.com/services/new/stripe?error=Content Spoofing
###SupportFu: https://asdasda.slack.com/services/new/supportfu?error=Content Spoofing
###Travis CI: https://asdasda.slack.com/services/new/travis?error=Content Spoofing
###Trello: https://asdasda.slack.com/services/new/trello?error=Content Spoofing
###Twitter: https://asdasda.slack.com/services/new/twitter?error=Content Spoofing
###Userlike: https://asdasda.slack.com/services/new/userlike?error=Content Spoofing
###WorkingOn: https://asdasda.slack.com/services/new/workingon?error=Content Spoofing
###Zendesk: https://asdasda.slack.com/services/new/zendesk?error=Content Spoofing

###Please download the screenshot proof of concept: https://www.dropbox.com/s/mnwa2pm1x4ziweg/slack content spoofing.rar

Regards,
Jayson Zabate