diff --git a/packages/core/content-manager/server/controllers/relations.js b/packages/core/content-manager/server/controllers/relations.js
index 082adadb8a..dba671432e 100644
--- a/packages/core/content-manager/server/controllers/relations.js
+++ b/packages/core/content-manager/server/controllers/relations.js
@@ -6,15 +6,16 @@ const { hasDraftAndPublish } = require('@strapi/utils').contentTypes;
 const { PUBLISHED_AT_ATTRIBUTE } = require('@strapi/utils').contentTypes.constants;
 
 const { getService } = require('../utils');
-const { validateFindNew } = require('./validation/relations');
+const { validateFindAvailable } = require('./validation/relations');
 
 module.exports = {
-  async findNew(ctx) {
+  async findAvailable(ctx) {
+    const { userAbility } = ctx.state;
     const { model, targetField } = ctx.params;
 
-    await validateFindNew(ctx.request.query);
+    await validateFindAvailable(ctx.request.query);
 
-    const { component, entityId, idsToOmit, page = 1, pageSize = 10, q } = ctx.request.query;
+    const { component, entityId, idsToOmit, page = 1, pageSize = 10, _q } = ctx.request.query;
 
     const sourceModelUid = component || model;
 
@@ -23,6 +24,29 @@ module.exports = {
       return ctx.badRequest("The model doesn't exist");
     }
 
+    // permission check
+    if (entityId) {
+      const entityManager = getService('entity-manager');
+      const permissionChecker = getService('permission-checker').create({
+        userAbility,
+        model: sourceModel,
+      });
+
+      if (permissionChecker.cannot.read()) {
+        return ctx.forbidden();
+      }
+
+      const entity = await entityManager.findOneWithCreatorRoles(entityId, model);
+
+      if (!entity) {
+        return ctx.notFound();
+      }
+
+      if (permissionChecker.cannot.read(entity)) {
+        return ctx.forbidden();
+      }
+    }
+
     const attribute = sourceModel.attributes[targetField];
     if (!attribute || attribute.type !== 'relation') {
       return ctx.badRequest("This relational field doesn't exist");
@@ -40,8 +64,8 @@ module.exports = {
 
     const query = strapi.db.queryBuilder(targetedModel.uid);
 
-    if (!isNil(q)) {
-      query.search(q);
+    if (!isNil(_q)) {
+      query.search(_q);
     }
 
     if (!isNil(ctx.request.query.filters)) {
diff --git a/packages/core/content-manager/server/controllers/validation/relations.js b/packages/core/content-manager/server/controllers/validation/relations.js
index 29630dd6d4..cf5372d5a8 100644
--- a/packages/core/content-manager/server/controllers/validation/relations.js
+++ b/packages/core/content-manager/server/controllers/validation/relations.js
@@ -2,12 +2,12 @@
 
 const { yup, validateYupSchema } = require('@strapi/utils');
 
-const validateFindNewSchema = yup
+const validateFindAvailableSchema = yup
   .object()
   .shape({
     component: yup.string(),
     entityId: yup.strapiID(),
-    q: yup.string(),
+    _q: yup.string(),
     idsToOmit: yup.array().of(yup.strapiID()),
     page: yup
       .number()
@@ -23,5 +23,5 @@ const validateFindNewSchema = yup
   .required();
 
 module.exports = {
-  validateFindNew: validateYupSchema(validateFindNewSchema, { strict: false }),
+  validateFindAvailable: validateYupSchema(validateFindAvailableSchema, { strict: false }),
 };
diff --git a/packages/core/content-manager/server/routes/admin.js b/packages/core/content-manager/server/routes/admin.js
index 5d891761b4..deac3c7015 100644
--- a/packages/core/content-manager/server/routes/admin.js
+++ b/packages/core/content-manager/server/routes/admin.js
@@ -82,7 +82,7 @@ module.exports = {
     {
       method: 'GET',
       path: '/relations/:model/:targetField',
-      handler: 'relations.findNew',
+      handler: 'relations.findAvailable',
       config: {
         policies: [
           'admin::isAuthenticatedAdmin',
diff --git a/packages/core/content-manager/server/tests/relations-dp.test.e2e.js b/packages/core/content-manager/server/tests/relations-dp.test.e2e.js
index 84581e9f82..94421deeee 100644
--- a/packages/core/content-manager/server/tests/relations-dp.test.e2e.js
+++ b/packages/core/content-manager/server/tests/relations-dp.test.e2e.js
@@ -112,7 +112,7 @@ describe('Relations with Draft & Publish', () => {
     await builder.cleanup();
   });
 
-  describe('findNew', () => {
+  describe('findAvailable', () => {
     test('relation not in a component && no entity', async () => {
       let res = await rq({
         method: 'GET',
diff --git a/packages/core/content-manager/server/tests/relations.test.e2e.js b/packages/core/content-manager/server/tests/relations.test.e2e.js
index 56057c19ab..0278e7c2ef 100644
--- a/packages/core/content-manager/server/tests/relations.test.e2e.js
+++ b/packages/core/content-manager/server/tests/relations.test.e2e.js
@@ -106,7 +106,7 @@ describe('Relations', () => {
     await builder.cleanup();
   });
 
-  describe('findNew', () => {
+  describe('findAvailable', () => {
     test('relation not in a component && no entity', async () => {
       let res = await rq({
         method: 'GET',
diff --git a/packages/plugins/i18n/server/register.js b/packages/plugins/i18n/server/register.js
index 372c02dd07..20e47d8474 100644
--- a/packages/plugins/i18n/server/register.js
+++ b/packages/plugins/i18n/server/register.js
@@ -22,9 +22,9 @@ const decorateRelations = () => {
   const { wrapParams } = getService('entity-service-decorator');
 
   strapi.container.get('controllers').extend('plugin::content-manager.relations', controller => {
-    const oldFindNew = controller.findNew;
+    const oldFindAvailable = controller.findAvailable;
     return Object.assign(controller, {
-      async findNew(ctx, next) {
+      async findAvailable(ctx, next) {
         const { model, targetField } = ctx.params;
         const { component } = ctx.request.query;
 
@@ -48,7 +48,7 @@ const decorateRelations = () => {
           ctx.request.query = await wrapParams(ctx.request.query);
         }
 
-        return oldFindNew(ctx, next);
+        return oldFindAvailable(ctx, next);
       },
     });
   });