The password reset form in Weblate before 2.10.1 provides different error messages depending on whether the email address is associated with an account, which allows remote attackers to enumerate user accounts via a series of requests.
www.openwall.com/lists/oss-security/2017/01/18/11
www.openwall.com/lists/oss-security/2017/01/20/1
www.securityfocus.com/bid/95676
github.com/WeblateOrg/weblate
github.com/WeblateOrg/weblate/blob/weblate-2.10.1/docs/changes.rst
github.com/WeblateOrg/weblate/commit/abe0d2a29a1d8e896bfe829c8461bf8b391f1079
github.com/WeblateOrg/weblate/issues/1317
nvd.nist.gov/vuln/detail/CVE-2017-5537