One Click Orgs before 1.2.3 allows remote authenticated users to trigger crafted SMTP traffic via (1) " (double quote) and newline characters in an org name or (2) " (double quote) characters in an e-mail address, related to a "2nd Order SMTP Injection" issue.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.