[ADVISORY] CVE-2025-22828: Unauthorised access to annotations

[Nux <nu...@li.nux.ro>]

Hello,

CloudStack users can add and read comments (annotations) on resources 
they are authorised to access. 
Due to an access validation issue that affects Apache CloudStack 
versions from 4.16.0, users who have access, prior access or knowledge 
of resource UUIDs can list and add comments (annotations) to such 
resources. 
An attacker with a user-account and access or prior knowledge of 
resource UUIDs may exploit this issue to read contents of the comments 
(annotations) or add malicious comments (annotations) to such resources.

This may cause potential loss of confidentiality of CloudStack 
environments and resources if the comments (annotations) contain any 
privileged information.
However, guessing or brute-forcing resource UUIDs are generally hard to 
impossible and access to listing or adding comments isn't same as access 
to CloudStack resources, making this issue of very low severity and 
general low impact.

CloudStack admins may also disallow listAnnotations and addAnnotation 
API access to non-admin roles in their environment as an interim 
measure.

Regards,
Lucian