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CVE-2026-11896— My Calendar <= 3.7.14 - Insecure Direct Object Reference to Unauthenticated Sensitive Information Disclosure via 'vcal' Parameter

Quick assessment

Affected
joedolson My Calendar – Accessible Event Manager
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.

joedolson My Calendar – Accessible Event Manager是joedolson的事件管理器插件。 Joe Dolson My Calendar 3.7.14及之前版本存在授权问题漏洞，该漏洞源于通过'vcal'参数缺少对用户控制密钥的验证，存在不安全的直接对象引用，可能导致未经身份验证的攻击者枚举事件ID并访问非公开、草稿、已删除和个人日历事件的完整iCalendar导出，泄露敏感事件元数据。

CVSS 5.3 · Medium EPSS 0.54% · P44

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
joedolson My Calendar – Accessible Event Manager ≤ 3.7.14 affected
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I. Basic Information for CVE-2026-11896

Vulnerability Information
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Vulnerability Title
My Calendar <= 3.7.14 - Insecure Direct Object Reference to Unauthenticated Sensitive Information Disclosure via 'vcal' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.14 via the 'vcal' parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate occurrence IDs and access the full iCalendar export of non-public, draft, trashed, and personal calendar events, disclosing sensitive event metadata including titles, descriptions, dates, locations, organizer and host details, permalinks, and related calendar metadata.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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
Joe Dolson My Calendar 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
joedolson My Calendar – Accessible Event Manager是joedolson的事件管理器插件。 Joe Dolson My Calendar 3.7.14及之前版本存在授权问题漏洞，该漏洞源于通过'vcal'参数缺少对用户控制密钥的验证，存在不安全的直接对象引用，可能导致未经身份验证的攻击者枚举事件ID并访问非公开、草稿、已删除和个人日历事件的完整iCalendar导出，泄露敏感事件元数据。
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
joedolson My Calendar – Accessible Event Manager 0 ~ 3.7.14 -

II. Public POCs for CVE-2026-11896

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III. Intelligence Information for CVE-2026-11896

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Patches & Fixes for CVE-2026-11896 (6)

News Coverage for CVE-2026-11896 (1)

Vendor Pages for CVE-2026-11896 (1)

Other References for CVE-2026-11896 (2)

IV. Related Vulnerabilities

Same product: My Calendar – Accessible Event Manager
Same vendor: joedolson
Same weakness: CWE-639

V. Comments for CVE-2026-11896

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