An attacker could modify the remember me cookie and authenticate as a different user. This attack is only possible if remember me functionality is enabled and the two users share a password hash or the password hashes are null.
Created drupal tracking bugs for this issue:
Affects: fedora-all [bug 1704657]
Created php-symfony tracking bugs for this issue:
Affects: epel-all [bug 1711316]
Affects: fedora-all [bug 1711315]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.