Description
Parse Server before 8.6.93 and 9.0.0 before 9.10.1-alpha.13 does not enforce identity-scoped protectedFields (authenticated, role, or per-user groups) on count queries using the $relatedTo operator, exposing the size of protected Relation fields. An authenticated user who can read the owning object can combine counts with an objectId constraint as a membership oracle to reveal confidential memberships such as private groups or block lists.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
parse-community parse-server
Default version status: unaffected
9.0.0 to < 9.10.1-alpha.13affected9.10.1-alpha.13unaffected
pkg:npm/parse-serverparse-community parse-server
Default version status: unaffected
0 to < 8.6.93affected8.6.93unaffected
pkg:npm/parse-server