Improper Input Validation
CRLF injection vulnerability in contact.php in Moonware (aka Dale Mooney Gallery) allows remote attackers to add arbitrary mail headers via CRLF sequences in the subject parameter. NOTE: this can be leveraged for spam by adding To or Cc headers.
CWE-20 - 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.