Matt Wright FormMail 1.9 and earlier allows remote attackers to bypass the HTTP_REFERER check and conduct unauthorized activities via (1) a blank referer, (2) a spoofed referer with a trusted domain/URL after the beginning of the referer, or (3) a spoofed referer with a trusted domain/URL in the beginning (hostname) portion of the referer.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This vulnerability has a 2.69% probability of being exploited in the next 30 days, ranking higher than 85% of all scored CVEs.