QwikSec

Security Database

CVE

CWE

Training

CVE-2026-1987

Published: Feb 14, 2026

Modified: Apr 8, 2026

PUBLISHED

CVSS v3.1

5.4

MEDIUM

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.

Vendor	Product	Versions
morelmathieuj	Scheduler Widget	affected `0 - <= 0.1.6`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/fd5f370c-743f-41f1-80ab-7f0805cae38c?source=cve

https://plugins.trac.wordpress.org/browser/scheduler-widget/trunk/scheduler-widget.php#L158

https://plugins.trac.wordpress.org/browser/scheduler-widget/tags/0.1.6/scheduler-widget.php#L158

https://owasp.org/www-project-web-security-testing-guide/latest/4-Web_Application_Security_Testing/05-Authorization_Testing/04-Testing_for_Insecure_Direct_Object_References

https://cwe.mitre.org/data/definitions/639.html

https://cwe.mitre.org/data/definitions/862.html

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