Hastymail 1.5 and earlier before 20061008 allows remote authenticated users to send arbitrary SMTP commands by placing them after a CRLF.CRLF sequence in the smtp_message parameter. NOTE: this crosses privilege boundaries if the SMTP server configuration prevents a user from establishing a direct SMTP session. NOTE: this is a different type of issue than CVE-2006-5262.
Improper Input Validation 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.