mail_html template in Squishdot 1.5.0 and earlier does not properly validate the (1) email and (2) title variables, which allows remote att…

mail_html template in Squishdot 1.5.0 and earlier does not properly validate the (1) email and (2) title variables, which allows remote attackers to bypass spam filters by injecting SMTP headers, probably due to a CRLF injection vulnerability.