Weblate has an argument injection in management console
### Impact
The SSH management console did not validate the passed input while adding the SSH host key, which could lead to an argument injection to `ssh-add`.
### Patches
*
https://github.com/WeblateOrg/weblate/pull/17722
### Workarounds
Properly limit access to the management console.
### References
This issue was reported to us by alexb_616
https://hackerone.com/alexb_616 via HackerOne.