published May 23, 2017
NVD has not assigned a CVSS score to this record. It sits in the 99.7th percentile for exploit probability.
The from method in library/core/class.email.php in Vanilla Forums before 2.3.1 allows remote attackers to spoof the email domain in sent messages and potentially obtain sensitive information via a crafted HTTP Host header, as demonstrated by a password reset request.