diff --git a/app/src/main/java/com/nextcloud/talk/controllers/ChatController.kt b/app/src/main/java/com/nextcloud/talk/controllers/ChatController.kt
index 2d4b2fbc1..caa519d79 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/ChatController.kt
+++ b/app/src/main/java/com/nextcloud/talk/controllers/ChatController.kt
@@ -346,7 +346,9 @@ class ChatController(args: Bundle) :
                         setTitle()
 
                         hasChatPermission =
-                            AttendeePermissionsUtil(currentConversation!!.permissions).hasChatPermission(conversationUser)
+                            AttendeePermissionsUtil(currentConversation!!.permissions).hasChatPermission(
+                                conversationUser
+                            )
 
                         try {
                             setupMentionAutocomplete()
@@ -1458,6 +1460,12 @@ class ChatController(args: Bundle) :
 
     private fun uploadFiles(files: MutableList<String>, isVoiceMessage: Boolean) {
         var metaData = ""
+
+        if (!hasChatPermission) {
+            Log.e(TAG, "uploading file(s) is forbidden because of missing attendee permissions")
+            return
+        }
+
         if (isVoiceMessage) {
             metaData = VOICE_MESSAGE_META_DATA
         }
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/ConversationsListController.java b/app/src/main/java/com/nextcloud/talk/controllers/ConversationsListController.java
index 8779a67c5..4d0f893a5 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/ConversationsListController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/ConversationsListController.java
@@ -86,6 +86,7 @@ import com.nextcloud.talk.models.json.statuses.StatusesOverall;
 import com.nextcloud.talk.ui.dialog.ChooseAccountDialogFragment;
 import com.nextcloud.talk.ui.dialog.ConversationsListBottomDialog;
 import com.nextcloud.talk.utils.ApiUtils;
+import com.nextcloud.talk.utils.AttendeePermissionsUtil;
 import com.nextcloud.talk.utils.ClosedInterfaceImpl;
 import com.nextcloud.talk.utils.ConductorRemapping;
 import com.nextcloud.talk.utils.DisplayUtils;
@@ -359,7 +360,6 @@ public class ConversationsListController extends BaseController implements Searc
 
         showShareToScreen = !showShareToScreen && hasActivityActionSendIntent();
 
-
         if (showShareToScreen) {
             hideSearchBar();
             getActionBar().setTitle(R.string.send_to_three_dots);
@@ -867,13 +867,25 @@ public class ConversationsListController extends BaseController implements Searc
     public boolean onItemClick(View view, int position) {
         try {
             selectedConversation = ((ConversationItem) Objects.requireNonNull(adapter.getItem(position))).getModel();
+
             if (selectedConversation != null && getActivity() != null) {
+                boolean hasChatPermission =
+                    new AttendeePermissionsUtil(selectedConversation.permissions).hasChatPermission(currentUser);
+
                 if (showShareToScreen) {
-                    handleSharedData();
-                    showShareToScreen = false;
+                    if (hasChatPermission && !isReadOnlyConversation(selectedConversation)) {
+                        handleSharedData();
+                        showShareToScreen = false;
+                    } else {
+                        Toast.makeText(context, R.string.send_to_forbidden, Toast.LENGTH_LONG).show();
+                    }
                 } else if (forwardMessage) {
-                    openConversation(bundle.getString(BundleKeys.INSTANCE.getKEY_FORWARD_MSG_TEXT()));
-                    forwardMessage = false;
+                    if (hasChatPermission && !isReadOnlyConversation(selectedConversation)) {
+                        openConversation(bundle.getString(BundleKeys.INSTANCE.getKEY_FORWARD_MSG_TEXT()));
+                        forwardMessage = false;
+                    } else {
+                        Toast.makeText(context, R.string.send_to_forbidden, Toast.LENGTH_LONG).show();
+                    }
                 } else {
                     openConversation();
                 }
@@ -885,6 +897,11 @@ public class ConversationsListController extends BaseController implements Searc
         return true;
     }
 
+    private Boolean isReadOnlyConversation(Conversation conversation) {
+        return conversation.conversationReadOnlyState ==
+            Conversation.ConversationReadOnlyState.CONVERSATION_READ_ONLY;
+    }
+
     private void handleSharedData() {
         collectDataFromIntent();
         if (!textToPaste.isEmpty()) {
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index ba1df70e9..b94aa7bd1 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -392,6 +392,8 @@
     <string name="send_to_three_dots">Send to …</string>
     <string name="read_storage_no_permission">Sharing files from storage is not possible without permissions</string>
     <string name="open_in_files_app">Open in Files app</string>
+    <string name="send_to_forbidden">You are not allowed to share content to this chat</string>
+
 
     <!-- Upload -->
     <string name="nc_add_file">Add to conversation</string>