mail/include.html in IceWarp Web Mail 5.5.1, as used by Merak Mail Server 8.3.0r and VisNetic Mail Server version 8.3.0 build 1, does not properly initialize the default_layout and layout_settings variables when an unrecognized HTTP_USER_AGENT string is provided, which allows remote attackers to access arbitrary files via a request with an unrecognized User Agent that also specifies the desired default_layout and layout_settings parameters.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Visnetic_mail_server | Deerfield | 8.3.0_build1 (including) | 8.3.0_build1 (including) |
| Web_mail | Icewarp | 5.5.1 (including) | 5.5.1 (including) |
| Mail_server | Merak | 8.3.0r (including) | 8.3.0r (including) |