diff --git a/CHANGES/5619.bugfix b/CHANGES/5619.bugfix
new file mode 100644
index 0000000000..058c075bf6
--- /dev/null
+++ b/CHANGES/5619.bugfix
@@ -0,0 +1,2 @@
+Fixed a bug in `has_repo_or_repo_ver_param_model_or_obj_perms` function to make
+it work with plugin Repositories.
diff --git a/pulpcore/app/global_access_conditions.py b/pulpcore/app/global_access_conditions.py
index 2a5875fcfb..b19c95317f 100644
--- a/pulpcore/app/global_access_conditions.py
+++ b/pulpcore/app/global_access_conditions.py
@@ -479,9 +479,9 @@ def has_repo_or_repo_ver_param_model_or_obj_perms(request, view, action, permiss
     )
     serializer.is_valid(raise_exception=True)
     if repository := serializer.validated_data.get("repository"):
-        return request.user.has_perm(permission, repository)
+        return request.user.has_perm(permission, repository.cast())
     elif repo_ver := serializer.validated_data.get("repository_version"):
-        return request.user.has_perm(permission, repo_ver.repository)
+        return request.user.has_perm(permission, repo_ver.repository.cast())
     return True