1 files changed, 3 insertions, 0 deletions
diff --git a/lib/private/AppFramework/Middleware/Security/PasswordConfirmationMiddleware.php b/lib/private/AppFramework/Middleware/Security/PasswordConfirmationMiddleware.php
index d00840084a3..e65fe94d608 100644
--- a/lib/private/AppFramework/Middleware/Security/PasswordConfirmationMiddleware.php
+++ b/lib/private/AppFramework/Middleware/Security/PasswordConfirmationMiddleware.php
@@ -79,6 +79,9 @@ class PasswordConfirmationMiddleware extends Middleware {
 
 		if ($this->isPasswordConfirmationStrict($reflectionMethod)) {
 			$authHeader = $this->request->getHeader('Authorization');
+			if (!str_starts_with(strtolower($authHeader), 'basic ')) {
+				throw new NotConfirmedException('Required authorization header missing');
+			}
 			[, $password] = explode(':', base64_decode(substr($authHeader, 6)), 2);
 			$loginName = $this->session->get('loginname');
 			$loginResult = $this->userManager->checkPassword($loginName, $password);