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CVE-2026-1987

MEDIUM 5.4 CVSS 3.1
Published
February 14, 2026
Last modified
June 17, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-639
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • morelmathieuj Scheduler Widget — Up to and including 0.1.6

References

  • cwe.mitre.org https://cwe.mitre.org/data/definitions/639.html
  • cwe.mitre.org https://cwe.mitre.org/data/definitions/862.html
  • owasp.org 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
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/scheduler-widget/tags/0.1.6/scheduler-widget.php#L158
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/scheduler-widget/trunk/scheduler-widget.php#L158
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/fd5f370c-743f-41f1-80ab-7f0805cae38c?source=cve
  • nvd.nist.gov Official NVD record