diff --git a/integrations/api_admin_test.go b/integrations/api_admin_test.go
index a7bbde4c53..41add45458 100644
--- a/integrations/api_admin_test.go
+++ b/integrations/api_admin_test.go
@@ -129,3 +129,18 @@ func TestAPIListUsers(t *testing.T) {
 	numberOfUsers := models.GetCount(t, &models.User{}, "type = 0")
 	assert.Equal(t, numberOfUsers, len(users))
 }
+
+func TestAPIListUsersNotLoggedIn(t *testing.T) {
+	prepareTestEnv(t)
+	req := NewRequest(t, "GET", "/api/v1/admin/users")
+	MakeRequest(t, req, http.StatusUnauthorized)
+}
+
+func TestAPIListUsersNonAdmin(t *testing.T) {
+	prepareTestEnv(t)
+	nonAdminUsername := "user2"
+	session := loginUser(t, nonAdminUsername)
+	token := getTokenForLoggedInUser(t, session)
+	req := NewRequestf(t, "GET", "/api/v1/admin/users?token=%s", token)
+	session.MakeRequest(t, req, http.StatusForbidden)
+}
diff --git a/integrations/api_user_search_test.go b/integrations/api_user_search_test.go
new file mode 100644
index 0000000000..8e7c429e77
--- /dev/null
+++ b/integrations/api_user_search_test.go
@@ -0,0 +1,52 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.package models
+
+package integrations
+
+import (
+	"net/http"
+	"testing"
+
+	api "code.gitea.io/sdk/gitea"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type SearchResults struct {
+	OK   bool        `json:"ok"`
+	Data []*api.User `json:"data"`
+}
+
+func TestAPIUserSearchLoggedIn(t *testing.T) {
+	prepareTestEnv(t)
+	adminUsername := "user1"
+	session := loginUser(t, adminUsername)
+	token := getTokenForLoggedInUser(t, session)
+	query := "user2"
+	req := NewRequestf(t, "GET", "/api/v1/users/search?token=%s&q=%s", token, query)
+	resp := session.MakeRequest(t, req, http.StatusOK)
+
+	var results SearchResults
+	DecodeJSON(t, resp, &results)
+	assert.NotEmpty(t, results.Data)
+	for _, user := range results.Data {
+		assert.Contains(t, user.UserName, query)
+		assert.NotEmpty(t, user.Email)
+	}
+}
+
+func TestAPIUserSearchNotLoggedIn(t *testing.T) {
+	prepareTestEnv(t)
+	query := "user2"
+	req := NewRequestf(t, "GET", "/api/v1/users/search?q=%s", query)
+	resp := MakeRequest(t, req, http.StatusOK)
+
+	var results SearchResults
+	DecodeJSON(t, resp, &results)
+	assert.NotEmpty(t, results.Data)
+	for _, user := range results.Data {
+		assert.Contains(t, user.UserName, query)
+		assert.Empty(t, user.Email)
+	}
+}
diff --git a/routers/api/v1/admin/user.go b/routers/api/v1/admin/user.go
index 609b53874e..0c7088151f 100644
--- a/routers/api/v1/admin/user.go
+++ b/routers/api/v1/admin/user.go
@@ -326,7 +326,7 @@ func GetAllUsers(ctx *context.APIContext) {
 
 	results := make([]*api.User, len(users))
 	for i := range users {
-		results[i] = convert.ToUser(users[i], ctx.IsSigned, ctx.User.IsAdmin)
+		results[i] = convert.ToUser(users[i], ctx.IsSigned, ctx.User != nil && ctx.User.IsAdmin)
 	}
 
 	ctx.JSON(200, &results)
diff --git a/routers/api/v1/user/user.go b/routers/api/v1/user/user.go
index 2e4ae273e5..76b4fc8dcc 100644
--- a/routers/api/v1/user/user.go
+++ b/routers/api/v1/user/user.go
@@ -67,7 +67,7 @@ func Search(ctx *context.APIContext) {
 
 	results := make([]*api.User, len(users))
 	for i := range users {
-		results[i] = convert.ToUser(users[i], ctx.IsSigned, ctx.User.IsAdmin)
+		results[i] = convert.ToUser(users[i], ctx.IsSigned, ctx.User != nil && ctx.User.IsAdmin)
 	}
 
 	ctx.JSON(200, map[string]interface{}{