Invalidating opt-in tokens

Date: 2019-04-09
CVE ID: CVE-2019-10643

Description

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

Affected versions

Contao 4.7 up to 4.7.2

Suggested solution

Update to Contao 4.7.3.