The middle sentence of the description is also a little hard for me to follow. How about...
By rebuilding an instance, an authenticated user may be able to
circumvent the Filter Scheduler bypassing imposed filters (for
example, the ImagePropertiesFilter or the IsolatedHostsFilter).
I agree that if these controls are relied on by some deployments as a security measure, then bypass by users does constitute a vulnerability.
In light of the Nova stable/ocata point release which was tagged a few hours after your impact description draft, the affects line should now be...
Affects: >=13.0.0 <=13.1.3, >=14.0.0 <=14.0.4, >=15.0.0 <=15.0.1
The middle sentence of the description is also a little hard for me to follow. How about...
By rebuilding an instance, an authenticated user may be able to Filter or the IsolatedHostsFi lter).
circumvent the Filter Scheduler bypassing imposed filters (for
example, the ImageProperties