description: Nextcloud Server before 9.0.55 and 10.0.2 suffers from a permission increase on re-sharing via OCS API issue. A permission related issue within the OCS sharing API allowed an authenticated adversary to reshare shared files with an increasing permission set. This may allow an attacker to edit files in a share despite having only a 'read' permission set. Note that this only affects folders and files that the adversary has at least read-only permissions for.
problem types: Permission Issues (CWE-275)
affected:
{
product: Nextcloud Server
vendor: Nextcloud
versions:
status: affected, version: All versions before 9.0.55 and 10.0.2
}