OttoFMS Important Security Update

Hey y’all,

We recently discovered a security vulnerability that affects all versions of OttoFMS. Our team has released an update to address this issue, ensuring the continued safety and integrity of your data.

This update only applies to OttoFMS. Otto v3 installations are not affected.

If your servers are hosted on, the update has already been applied. There is no further action required on your part.

Action Required

Please download and install the latest OttoFMS software update (version 4.3.4) by following the instructions in the docs. We recommend completing this update as soon as possible to maintain optimal security.

Steps to Install the update:

  1. Go to the OttoFMS Docs.
  2. Follow the step-by-step instructions to apply the patch.

For assistance or if you encounter any difficulties, please do not hesitate to contact our support team at We are here to help.

At Proof+Geist, we are committed to maintaining the highest security standards and apologize for any inconvenience this may cause. We appreciate your immediate attention to this matter and your continued trust in our products.

Thank you for taking prompt action.

Warm regards,

The Proof+Geist team