description: CyberArk Identity versions up to and including 22.1 in the 'StartAuthentication' resource, exposes the response header 'X-CFY-TX-TM'. In certain configurations, that response header contains different, predictable value ranges which can be used to determine whether a user exists in the tenant.
problem types: User enumeration
affected:
{
product: CyberArk Identity
vendor: n/a
versions:
status: affected, version: 22.1
}