diff --git a/src/components/challenge-modal/challenge-modal.tsx b/src/components/challenge-modal/challenge-modal.tsx
index 9def87c9..d10321ab 100644
--- a/src/components/challenge-modal/challenge-modal.tsx
+++ b/src/components/challenge-modal/challenge-modal.tsx
@@ -221,7 +221,7 @@ const RegularChallengeContent = ({ challenge, closeModal }: RegularChallengeCont
               <iframe
                 ref={iframeRef}
                 src={iframeUrlState}
-                sandbox='allow-scripts allow-forms allow-popups allow-top-navigation-by-user-activation'
+                sandbox='allow-scripts allow-forms allow-popups allow-same-origin allow-top-navigation-by-user-activation'
                 onLoad={handleIframeLoad}
                 className={styles.iframe}
                 title={t('challenge_iframe', { defaultValue: 'Challenge authentication' })}