CVE-2026-1987 Missing authorization in Scheduler Widget
Authenticated subscribers can modify arbitrary scheduler events due to missing authorization checks in the Scheduler Widget plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1987?
CVE-2026-1987 is a medium-severity missing authorization vulnerability in morelmathieuj Scheduler Widget, published on 14 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Scheduler Widget plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 0.1.6. This is due to the `scheduler_widget_ajax_save_event()` function lacking proper authorization checks and ownership verification when updating events. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify any event in the scheduler via the `id` parameter granted they have knowledge of the event ID.
Weakness: CWE-639
Which versions are affected by CVE-2026-1987?
How do I fix CVE-2026-1987?
No fix has been published for CVE-2026-1987 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-1987 being exploited?
There is no known exploitation of CVE-2026-1987 in the wild and no public exploit code.
Sources
Also known as GHSA-wcg8-g6m5-jgh5.