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CVE-2026-1987— Scheduler Widget <= 0.1.6 - Insecure Direct Object Reference to Authenticated (Subscriber+) Arbitrary Event Modification

Quick assessment

Affected
morelmathieuj Scheduler Widget
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Scheduler Widget 0.1.6及之前版本存在安全漏洞，该漏洞源于scheduler_widget_ajax_save_event函数缺少适当的授权检查和所有权验证，可能导致不安全的直接对象引用攻击。

CVSS 5.4 · Medium EPSS 0.31% · P24
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I. Basic Information for CVE-2026-1987

Vulnerability Information
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Vulnerability Title
Scheduler Widget <= 0.1.6 - Insecure Direct Object Reference to Authenticated (Subscriber+) Arbitrary Event Modification
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Scheduler Widget 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Scheduler Widget 0.1.6及之前版本存在安全漏洞，该漏洞源于scheduler_widget_ajax_save_event函数缺少适当的授权检查和所有权验证，可能导致不安全的直接对象引用攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
morelmathieuj Scheduler Widget * ~ 0.1.6 -

II. Public POCs for CVE-2026-1987

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III. Intelligence Information for CVE-2026-1987

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Patches & Fixes for CVE-2026-1987 (1)

Vendor Advisories for CVE-2026-1987 (1)

News Coverage for CVE-2026-1987 (1)

IV. Related Vulnerabilities

Same weakness: CWE-639

V. Comments for CVE-2026-1987

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