diff --git a/app/src/main/java/org/fdroid/fdroid/installer/ApkVerifier.java b/app/src/main/java/org/fdroid/fdroid/installer/ApkVerifier.java
index 5e40e3637..ebcd56b8d 100644
--- a/app/src/main/java/org/fdroid/fdroid/installer/ApkVerifier.java
+++ b/app/src/main/java/org/fdroid/fdroid/installer/ApkVerifier.java
@@ -51,7 +51,7 @@ class ApkVerifier {
         this.pm = context.getPackageManager();
     }
 
-    public void verifyApk() throws ApkVerificationException {
+    public void verifyApk() throws ApkVerificationException, ApkPermissionUnequalException {
         // parse downloaded apk file locally
         PackageInfo localApkInfo = pm.getPackageArchiveInfo(
                 localApkUri.getPath(), PackageManager.GET_PERMISSIONS);
@@ -78,9 +78,9 @@ class ApkVerifier {
         // Thus, containsAll() instead of equals() is used!
         // See also https://gitlab.com/fdroid/fdroidclient/issues/703
         if (!expectedPermissions.containsAll(localPermissions)) {
-            throw new ApkVerificationException(
+            throw new ApkPermissionUnequalException(
                     "Permissions of the apk file are not a true subset of the permissions listed by the repo," +
-                    " i.e., some permissions have not been shown to the user!");
+                            " i.e., some permissions have not been shown to the user!");
         }
 
         int localTargetSdkVersion = localApkInfo.applicationInfo.targetSdkVersion;
@@ -93,7 +93,6 @@ class ApkVerifier {
         } else if (localTargetSdkVersion != expectedTargetSdkVersion) {
             throw new ApkVerificationException("TargetSdkVersion of apk file is not the expected targetSdkVersion!");
         }
-
     }
 
     private HashSet<String> getLocalPermissionsSet(PackageInfo localApkInfo) {
@@ -116,4 +115,15 @@ class ApkVerifier {
         }
     }
 
+    public static class ApkPermissionUnequalException extends Exception {
+
+        ApkPermissionUnequalException(String message) {
+            super(message);
+        }
+
+        ApkPermissionUnequalException(Throwable cause) {
+            super(cause);
+        }
+    }
+
 }
diff --git a/app/src/main/java/org/fdroid/fdroid/installer/Installer.java b/app/src/main/java/org/fdroid/fdroid/installer/Installer.java
index b6e6c4332..8df65cd4c 100644
--- a/app/src/main/java/org/fdroid/fdroid/installer/Installer.java
+++ b/app/src/main/java/org/fdroid/fdroid/installer/Installer.java
@@ -226,17 +226,35 @@ public abstract class Installer {
      * @param apk         apk object of the app that should be installed
      */
     public void installPackage(Uri localApkUri, Uri downloadUri, Apk apk) {
-        Uri sanitizedUri;
         try {
             // verify that permissions of the apk file match the ones from the apk object
             ApkVerifier apkVerifier = new ApkVerifier(context, localApkUri, apk);
             apkVerifier.verifyApk();
+        } catch (ApkVerifier.ApkVerificationException e) {
+            Log.e(TAG, e.getMessage(), e);
+            sendBroadcastInstall(downloadUri, Installer.ACTION_INSTALL_INTERRUPTED,
+                    e.getMessage());
+            return;
+        } catch (ApkVerifier.ApkPermissionUnequalException e) {
+            // if permissions of apk are not the ones listed in the repo
+            // and an unattended installer is used, a wrong permission screen
+            // has been shown, thus fallback to AOSP DefaultInstaller!
+            if (isUnattended()) {
+                Log.e(TAG, e.getMessage(), e);
+                Log.e(TAG, "Falling back to AOSP DefaultInstaller!");
+                DefaultInstaller defaultInstaller = new DefaultInstaller(context);
+                defaultInstaller.installPackageInternal(localApkUri, downloadUri, apk);
+                return;
+            }
+        }
 
+        Uri sanitizedUri;
+        try {
             // move apk file to private directory for installation and check hash
             sanitizedUri = ApkFileProvider.getSafeUri(
                     context, localApkUri, apk, supportsContentUri());
-        } catch (ApkVerifier.ApkVerificationException | IOException e) {
-            Log.e(TAG, "ApkVerifier / ApkFileProvider failed", e);
+        } catch (IOException e) {
+            Log.e(TAG, e.getMessage(), e);
             sendBroadcastInstall(downloadUri, Installer.ACTION_INSTALL_INTERRUPTED,
                     e.getMessage());
             return;