The Popup Builder by OptinMonster WordPress plugin before 2.12.2 does not ensure that the campaign to be loaded via some shortcodes is actually a campaign, allowing any authenticated users such as subscriber to retrieve the content of arbitrary posts, like draft, private or even password protected ones.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Optinmonster | Optinmonster | * | 2.12.2 (excluding) |