CVE-2026-87966— Easy Appointments 4.0 - 4.0.2.1 - Unauthenticated Arbitrary Appointment Modification and Deletion via IDOR
Quick assessment
Affected
Unknown Easy Appointments
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.
Easy Appointments WordPress 插件在 4.0.2.2 之前的版本中，其未认证（unauthenticated）的预约预订端点在更新由请求中提供的 id 所标识的现有预约时，未执行所有权或授权检查，使得未认证的 attackers 能够覆盖任意预约，并可通过后续的清理删除操作删除这些预约。
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Unknown | Easy Appointments | 4.0< 4.0.2.2 |
affected |
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I. Basic Information for CVE-2026-87966
Vulnerability Information
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Vulnerability Title
Easy Appointments 4.0 - 4.0.2.1 - Unauthenticated Arbitrary Appointment Modification and Deletion via IDOR
Source: CVE Program / CVE List V5
Vulnerability Description
The Easy Appointments WordPress plugin before 4.0.2.2 does not perform an ownership or authorization check on its unauthenticated appointment-reservation endpoint before updating an existing appointment identified by a request-supplied id, allowing unauthenticated attackers to overwrite, and through a follow-on cleanup delete, arbitrary appointments.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Unknown | Easy Appointments | 4.0 ~ 4.0.2.2 | - |
|
II. Public POCs for CVE-2026-87966
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Other References for CVE-2026-87966 (1)
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🔗 Easy Appointments 4.0 – 4.0.2.1 – Unauthenticated Arbitrary Appointment Modification and Deletion via IDOR | CVE 2026-87966 | Plugin Vulnerabilities exploit vdb-entry technical-description
Same Patch Batch · Unknown · 2026-09-18 · 32 CVEs total
| CVE-2026-88994 | 6.6 MEDIUM | All Bootstrap Blocks 1.3.20 - 1.3.31 - Contributor+ LFI via lightspeed Block Attributes |
| CVE-2026-79713 | 6.5 MEDIUM | Breeze Cache 1.2.5 - 2.5.14 - Unauthenticated Cache Poisoning via Unkeyed Tracking Paramet |
| CVE-2026-90977 | 5.3 MEDIUM | Clean Login < 1.19 - Unauthenticated CAPTCHA Bypass via Empty Session Comparison |
| CVE-2026-86796 | 5.3 MEDIUM | WP Ghost (Hide My WP Ghost) 7.0.10 - Unauthenticated Firewall, Threat Detection and URL Hi |
| CVE-2026-86800 | 5.3 MEDIUM | WP Ghost (Hide My WP Ghost) < 7.0.11 - Unauthenticated URL Hiding Bypass via Loopback Comp |
| CVE-2026-90976 | 5.3 MEDIUM | Clean Login < 1.19 - Unauthenticated Account Creation with Registration Disabled |
| CVE-2026-85350 | UpsellWP < 2.2.10 - Unauthenticated Price Manipulation via Frequently Bought Together | |
| CVE-2026-84902 | King Addons for Elementor < 51.1.81 - Contributor+ Stored XSS via Template Catalog Import | |
| CVE-2026-85127 | VikBooking 1.8.8 - 1.8.14 - Unauthenticated Stored XSS via SVG Chat Attachment | |
| CVE-2026-87767 | WP Shortcut Link <= 1.2.0 - Unauthenticated SQL Injection via url | |
| CVE-2026-85123 | Easy Form Builder 4.0.0 - 4.1.3 - Unauthenticated Registration Policy Bypass via Login For | |
| CVE-2026-85009 | RestroPress <= 3.4.6 - Unauthenticated Order Enumeration and Order Note Modification via P | |
| CVE-2026-85122 | Easy Form Builder 4.0.0 - 4.1.3 - Unauthenticated Stored XSS via Form Type Confusion | |
| CVE-2026-84903 | King Addons for Elementor < 51.1.81 - Contributor+ Private Post Content Disclosure via kng | |
| CVE-2026-84904 | King Addons for Elementor 51.1.56 - 51.1.80 - Author+ Missing Authorization via Image Opti | |
| CVE-2026-81810 | All-in-One WP Migration and Backup < 7.111 - Authenticated Privilege Escalation to Admin v | |
| CVE-2026-81340 | MasterStudy LMS < 3.7.50 - Instructor+ Order Status Manipulation via IDOR | |
| CVE-2026-84738 | AF Companion < 2.2.0 - Shop Manager+ Arbitrary File Upload to RCE | |
| CVE-2026-87770 | Price Drop Alert for WooCommerce <= 1.1 - Unauthenticated SQL Injection via product | |
| CVE-2026-87775 | Tz Weekly Radio Schedule <= 1.8.1 - Unauthenticated SQLi via tzwrs_update_cell |
Showing top 20 of 32 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Easy Appointments
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Hydra Booking < 1.2.2 - Hydra Host+ Cross-Host Booking Delet
V. Comments for CVE-2026-87966
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