Embedthis Appweb before 4.6.6 and 5.x before 5.2.1 allows remote attackers to cause a denial of service (NULL pointer dereference) via a Range header with an empty value, as demonstrated by "Range: x=,".
EmbedThis GoAhead 3.0.0 through 3.4.1 does not properly handle path segments starting with a . (dot), which allows remote attackers to conduct directory traversal attacks, cause a denial of service (heap-based buffer overflow and crash), or possibly execute arbitrary code via a crafted URI.