Werk #9648: Create custom administrator user with Checkmk 2.5 sites
| Component | Firmware |
| Title | Create custom administrator user with Checkmk 2.5 sites |
| Date | Aug 10, 2026 |
| Level | Trivial Change |
| Class | Bug Fix |
| Compatibility | Incompatible - Manual interaction might be required |
| Appliance Version | 1.7.23 Not yet released |
This Werk fixes creating sites with a custom administrator user for Checkmk 2.5.
Administrators are impacted by this, because of two things: password length and required site start.
- The required length for the initial site administrator password has been increased to 12 characters minimum. This only affects the first administrator user which is created through the appliance site management interface. Additional administrator users inside Checkmk are affected by the limit of the used Checkmk version.
- Starting with Checkmk 2.5 the site has to be started in order to create the custom administrator user. The site will continue running if it was created with enabled autostart. It will be stopped after user creation if autostart was disabled.
The background for this change is the implementation of Werk 18067 in Checkmk 2.5. This requires a different approach for the creation of the initial administrative user. Versions lower than Checkmk 2.5 will continue to use the old approach, but they are still subject to the password length change mentioned above.
For Checkmk 2.5 and newer login to the built-in 'cmkadmin' account will be disabled if a custom administrator user is created upon site creation.