diff --git a/src/oidc.js b/src/oidc.js
index 7d3e0bc58..7a1be42c3 100644
--- a/src/oidc.js
+++ b/src/oidc.js
@@ -399,12 +399,10 @@ function renderInteractionPage(provider) {
     return async function (req, res, next) {
         try {
             const { uid, prompt, params, session } = await provider.interactionDetails(req, res);
-            console.log('details', await provider.interactionDetails(req, res));
 
             debug(`route interaction get uid:${uid} prompt.name:${prompt.name} client_id:${params.client_id} session:${session}`);
 
-            const [error, client] = await safe(clientsGet(params.client_id));
-            if (error) return next(error);
+            const client = await clientsGet(params.client_id);
 
             switch (prompt.name) {
             case 'login': {
@@ -414,10 +412,26 @@ function renderInteractionPage(provider) {
                 });
             }
             case 'consent': {
-                return res.render('interaction', {
-                    submitUrl: `${ROUTE_PREFIX}/interaction/${uid}/confirm`,
-                    name: client?.name || 'Cloudron'
-                });
+                const options = {
+                    hasAccess: false,
+                    submitUrl: '',
+                    name: client?.name || ''
+                };
+
+                // check if user has access to the app if client refers to an app
+                if (client.appId) {
+                    const app = await apps.get(client.appId);
+                    const user = await users.get(session.accountId);
+
+                    options.name = app.label || app.fqdn;
+                    options.hasAccess = apps.canAccess(app, user);
+                } else {
+                    options.hasAccess = true;
+                }
+
+                options.submitUrl = `${ROUTE_PREFIX}/interaction/${uid}/${options.hasAccess ? 'confirm' : 'abort'}`;
+
+                return res.render('interaction', options);
             }
             default:
                 return undefined;
@@ -442,7 +456,7 @@ function interactionLogin(provider) {
         const prompt = details.prompt;
         const name = prompt.name;
 
-        debug(`route interaction login post uid:${uid} prompt.name:${name}`, req.body);
+        debug(`route interaction login post uid:${uid} prompt.name:${name}`);
 
         assert.equal(name, 'login');
 
@@ -482,15 +496,30 @@ function interactionConfirm(provider) {
     return async function (req, res, next) {
         try {
             const interactionDetails = await provider.interactionDetails(req, res);
-            const { uid, prompt: { name, details }, params, session: { accountId } } = interactionDetails;
+            let { grantId, uid, prompt: { name, details }, params, session: { accountId } } = interactionDetails;
 
             debug(`route interaction confirm post uid:${uid} prompt.name:${name} accountId:${accountId}`);
 
             assert.equal(name, 'consent');
 
-            let { grantId } = interactionDetails;
-            let grant;
+            const client = await clientsGet(params.client_id);
 
+            // Check if user has access to the app if client refers to an app
+            // In most cases the user interaction already ends in the consent screen (see above)
+            if (client.appId) {
+                const app = await apps.get(client.appId);
+                const user = await users.get(accountId);
+
+                if (!apps.canAccess(app, user)) {
+                    const result = {
+                        error: 'access_denied',
+                        error_description: 'User has no access to this app',
+                    };
+                    return await provider.interactionFinished(req, res, result, { mergeWithLastSubmission: false });
+                }
+            }
+
+            let grant;
             if (grantId) {
                 // we'll be modifying existing grant in existing session
                 grant = await provider.Grant.find(grantId);
diff --git a/src/oidc_templates/interaction.ejs b/src/oidc_templates/interaction.ejs
index bec8f0054..34efda79a 100644
--- a/src/oidc_templates/interaction.ejs
+++ b/src/oidc_templates/interaction.ejs
@@ -26,15 +26,23 @@
         <div class="col-md-12" style="text-align: center;">
           <img width="128" height="128" style="margin-top: -84px" src="/api/v1/cloudron/avatar"/>
           <br/>
-          <h1>Authorize <%= name %></h1>
+<% if (hasAccess) { -%>
+          <h3>Authorize for <b><%= name %></b></h3>
+<% } else { -%>
+          <h3>You do not have access to <b><%= name %></b></h3>
+<% } -%>
         </div>
       </div>
       <br/>
       <div class="row">
         <div class="col-md-12 text-center">
+<% if (hasAccess) { -%>
           <form method="post" action="<%= submitUrl %>">
             <button class="btn btn-primary btn-outline" type="submit">Authorize</button>
           </form>
+<% } else { -%>
+          <a class="btn btn-primary btn-outline" href="<%= submitUrl %>">Continue</a>
+<% } -%>
         </div>
       </div>
     </div>