The Grammarly extension before 2018-02-02 for Chrome allows remote attackers to discover authentication tokens via an action: user request to iframe.gr_-ifr, because the exposure of these tokens is not restricted to any specific web site.
The product does not properly verify that the source of data or communication is valid.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Grammarly | Grammarly | 2018-02-02 (including) | 2018-02-02 (including) |