Is Intellistack down?

We’ve identified an issue affecting Streamline workflows that include an email (SMTP) step without a file attachment. Sessions that reach one of these email steps may fail instead of sending the email, and the session doesn’t complete. We’re working on a fix and will share an update when available.

The issue has been identified and a fix is being implemented.

This incident has been resolved.

Customers of Spectrum using Spectrum's Security Shield may experience being blocked when trying to execute a new workflow. We have confirmed with Spectrum that they have removed us from their block list but the block may remain in effect for the next 24 hours for some subset of users

Spectrum has removed us from its Security Shield block list. Some Spectrum customers may still be blocked from starting a new workflow while the change takes effect. Spectrum advised that this may take up to 24 hours for some users.

We're aware of the critical PHP vulnerabilities disclosed by the PHP project on October 21, 2026. Like much of the web, some of our services use PHP, and our Engineering and Security teams began working on this as soon as the advisory was announced. Here's where things stand: - We're preparing to apply the security updates and have put additional protective measures in place in the meantime. - We're actively monitoring our environment, and to date we haven't identified any evidence that these vulnerabilities have been exploited or that customer data has been accessed. - No action is required on your part. - We don't expect service disruption. If any maintenance is needed, we'll post it here in advance. We'll share our next update here as things progress. Subscribe to this page to get updates as they're posted.

Streamline: Update - October 21, 2026, 2:23 PM ET We've completed applying the PHP security updates to Intellistack Streamline as of 2:23 PM ET. Work on the other affected services is underway, and we'll post an update here as each is completed.  Our Engineering and Security teams are continuing to monitor our environment closely.  To date, we haven't identified any evidence that these vulnerabilities were exploited or that customer data was accessed. No action is required on your part.

Formstack Forms: Update - October 21, 2026, 7:15 PM ET We've completed security updates for Formstack Forms across both our US and AU environments. The updates were applied and validated as of 7:15 PM ET on October 21. Streamline and the Formsite public website were updated earlier today, and work on Formstack Documents and Formstack Admin is underway. Our monitoring still shows no evidence that these vulnerabilities were exploited or that customer data was accessed. No action is required on your part. We'll post our next update as each remaining service is completed. Subscribe to this page to get notified as updates go out.

Update - October 21, 2026, 7:55 PM ET We've completed applying the PHP security updates to Formstack Admin console (account sign-in and management) as of 7:55 PM ET. Here's where things stand: Formsite: The Formsite application doesn't use PHP and wasn't affected. Our public formsite.com website was updated as of 12:47 PM ET. Streamline: Updated as of 2:23 PM ET Formstack Forms: Updated as of 7:15 PM ET Formstack Admin: Updated as of 7:55 PM ET Formstack Documents: Updates are being validated and will be rolled out next. Our Engineering and Security teams are continuing to monitor our environment closely. To date, we haven't identified any evidence that these vulnerabilities were exploited or that customer data was accessed. No action is required on your part. We'll post another update here as each remaining service is completed.

Update - October 21, 2026, 10:51 PM ET We've completed applying the PHP security updates to Formstack Documents as of 10:51 PM ET. With this update, security updates are now complete across all affected services. Here's the final status: Formsite: The Formsite application doesn't use PHP and wasn't affected. Our public formsite.com website was updated as of 12:47 PM ET. Streamline: Updated as of 2:23 PM ET Formstack Forms: Updated and validated in both our US and Australia regions as of 7:15 PM ET Formstack Admin console (account sign-in and management): Updated as of 7:55 PM ET Formstack Documents: Updated and verified as of 10:51 PM ET All times above are October 21, 2026. Our Engineering and Security teams will continue to monitor our environment. To date, we haven't identified any evidence that these vulnerabilities were exploited or that customer data was accessed. No action is required on your part; there's nothing to install, patch, or configure on your end. We will complete our post-update monitoring and will post any additional updates here if warranted.

We identified an issue that caused some Formstack Sign documents to be finalized and delivered without an audit trail. The issue affected documents on October 8 from 7:42 PM to 9:31 PM ET. The signing process has recovered, and newly completed documents are processing normally. We are implementing a recovery script to restore the missing audit trails for affected documents. As part of this recovery process, some customers may receive a duplicate notification that their document has been finalized. If you previously received this notification, no action is required, and the duplicate message can be disregarded. We apologize for the inconvenience.

We have identified an issue causing some Formstack Sign integrations, including Documents-to-Sign deliveries, to lose authentication unexpectedly. Affected deliveries may fail with an authentication error, even if the connection was recently reauthenticated. Our Engineering team is actively working to deploy a permanent fix. We will provide another update as soon as the fix has been released.

A fix has been deployed to prevent Formstack Sign connections from losing authentication unexpectedly, and we are monitoring the results. We are also working to automatically restore authentication for previously affected connections. Customers who need to resume processing immediately may manually reauthenticate their Formstack Sign connection. We will provide another update once the restoration process is complete.

The issue causing some Formstack Sign connections to lose authentication unexpectedly has been resolved. A fix has been deployed, and authentication has been restored for affected connections. Customers should now be able to process Documents-to-Sign deliveries normally. If you continue to receive an authentication error, please reauthenticate your Formstack Sign connection and retry the delivery. Thank you for your patience while we worked to resolve this issue.