Unintentional Adminhtml Login Page Redirect Patch

README.md

Usage

1. Download the github-issue-22590.diff and save it to MAGENTO_ROOT/patches/composer/
2. Require composer-patches: composer require cweagans/composer-patches
3. Add the patches section to your composer.json extra field.
4. Remove existing packages: rm -rf vendor/magento/framework
5. Run composer install to re-install and apply patches.

composer.json

{
  "require": {
    "cweagans/composer-patches": "^1"
  },
  "extra": {
    "patches": {
      "magento/framework": {
        "MAGETWO-43364: Unintentional Adminhtml Login Page Redirect Patch": "patches/composer/github-issue-22590.diff"
      }
    }
  }
}

github-issue-22590.diff

diff --git a/vendor/magento/framework/App/Router/ActionList.php b/vendor/magento/framework/App/Router/ActionList.php
index 9944e617b..0f35656ff 100644
--- a/vendor/magento/framework/App/Router/ActionList.php
+++ b/vendor/magento/framework/App/Router/ActionList.php
@@ -91,7 +91,7 @@ class ActionList
         if ($area) {
             $area = '\\' . $area;
         }
-        if (strpos($namespace, self::NOT_ALLOWED_IN_NAMESPACE_PATH) !== false) {
+        if (stripos($namespace, self::NOT_ALLOWED_IN_NAMESPACE_PATH) !== false) {
             return null;
         }
         if (in_array(strtolower($action), $this->reservedWords)) {