Contao Does Not Expire Tokens Correctly

Security researcher Ali Razzaq has discovered that confirming an opt-in token does not invalidate previous opt-in tokens in Contao 4.7...

Insecure Session Management

contao/core-bundle contains an insecure session management. The old opt-in tokens are not invalidated when a new token is confirmed...

Confirming an opt-in token does not invalidate previous opt-in tokens

More info at https://contao.org/en/news/security-vulnerability-cve-2019-10643.html...