Scheduler Widget Plugin up to 0.1.6 on WordPress scheduler_widget_ajax_save_event ID resource injection

Summaryinfo

A vulnerability was found in Scheduler Widget Plugin up to 0.1.6 on WordPress. It has been declared as problematic. Affected is the function scheduler_widget_ajax_save_event. The manipulation of the argument ID results in resource injection. This vulnerability is known as CVE-2026-1987. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in Scheduler Widget Plugin up to 0.1.6 on WordPress. Affected is the function scheduler_widget_ajax_save_event. The manipulation of the argument id with an unknown input leads to a resource injection vulnerability. CWE is classifying the issue as CWE-99. The product receives input from an upstream component, but it does not restrict or incorrectly restricts the input before it is used as an identifier for a resource that may be outside the intended sphere of control. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-1987. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/19/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Name

• Scheduler Widget Plugin

Version

• 0.1.0
• 0.1.1
• 0.1.2
• 0.1.3
• 0.1.4
• 0.1.5
• 0.1.6

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