If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | * | 85.0 (excluding) |
| Firefox_esr | Mozilla | * | 78.7 (excluding) |
| Thunderbird | Mozilla | * | 78.7 (excluding) |