The E4X implementation in Mozilla Firefox before 1.5.0.1, Thunderbird 1.5 if running Javascript in mail, and SeaMonkey before 1.0 exposes the internal AnyName object to external interfaces, which allows multiple cooperating domains to exchange information in violation of the same origin restrictions.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | 1.5 (including) | 1.5 (including) |
| Firefox | Mozilla | 1.5-beta1 (including) | 1.5-beta1 (including) |
| Seamonkey | Mozilla | 1.0 (including) | 1.0 (including) |
| Seamonkey | Mozilla | 1.0-beta (including) | 1.0-beta (including) |
| Thunderbird | Mozilla | 1.5 (including) | 1.5 (including) |
| Firefox | Ubuntu | dapper | * |
| Firefox | Ubuntu | edgy | * |
| Firefox | Ubuntu | feisty | * |
| Firefox-granparadiso | Ubuntu | devel | * |
| Lightning-sunbird | Ubuntu | devel | * |
| Midbrowser | Ubuntu | devel | * |
| Mozilla-thunderbird | Ubuntu | dapper | * |
| Mozilla-thunderbird | Ubuntu | edgy | * |
| Mozilla-thunderbird | Ubuntu | feisty | * |