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CVE-2026-16540— Simply Schedule Appointments < 1.6.12.6 - Unauthenticated Appointment Data Disclosure and Mass Deletion via purge Endpoint

Quick assessment

Affected
Unknown Simply Schedule 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.

nsquared simply schedule appointments是nsquared个人开发者的一套在线预约安排插件。 WordPress Simply Schedule Appointments 1.6.12.6之前版本存在授权问题漏洞，该漏洞源于未正确限制批量预约操作仅限于请求者自己的记录，导致未经身份验证的用户能够检索整个站点所有预约的个人数据，并可在高级版中永久删除它们。

AI Predicted 8.6 Difficulty: Easy EPSS 0.41% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Simply Schedule Appointments < 1.6.12.6 affected
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I. Basic Information for CVE-2026-16540

Vulnerability Information
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Vulnerability Title
Simply Schedule Appointments < 1.6.12.6 - Unauthenticated Appointment Data Disclosure and Mass Deletion via purge Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
The Simply Schedule Appointments WordPress plugin before 1.6.12.6 does not correctly restrict a bulk appointment operation to the requester's own records, allowing unauthenticated users to retrieve the personal data of all appointments across the site and, on premium editions, to permanently delete them.
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
Vulnerability Title
WordPress Simply Schedule Appointments 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
nsquared simply schedule appointments是nsquared个人开发者的一套在线预约安排插件。 WordPress Simply Schedule Appointments 1.6.12.6之前版本存在授权问题漏洞，该漏洞源于未正确限制批量预约操作仅限于请求者自己的记录，导致未经身份验证的用户能够检索整个站点所有预约的个人数据，并可在高级版中永久删除它们。
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
Unknown Simply Schedule Appointments 0 ~ 1.6.12.6 -

II. Public POCs for CVE-2026-16540

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III. Intelligence Information for CVE-2026-16540

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News Coverage for CVE-2026-16540 (1)

Same Patch Batch · Unknown · 2026-08-02 · 27 CVEs total

CVE-2026-14817 Element Pack Elementor Addons < 8.7.13 - Contributor+ DOM-Based Stored XSS via uikit Data
CVE-2026-14864 JetEngine < 3.8.12 - Contributor+ Stored XSS via jet_engine Shortcode
CVE-2026-14920 AcyMailing < 10.11.1 - Unauthenticated SQL Injection via subscription[] Parameter
CVE-2026-14841 King Addons for Elementor < 51.1.76 - Reflected XSS via Posts Grid Widget
CVE-2026-14938 FluentBoards < 1.95.3 - Subscriber+ Cross-Board Task Disclosure via IDOR
CVE-2026-15151 Five Star Restaurant Reservations < 2.7.23 - Booking Manager+ Missing Authorization via rt
CVE-2026-15206 SMS Alert Order Notifications – WooCommerce < 3.9.8 - Unauthenticated Account Takeover via
CVE-2026-16256 Pouco Import Users <= 1.0.0 - Unauthenticated Privilege Escalation
CVE-2026-15248 Meta Box < 5.13.1 - Contributor+ Arbitrary Attachment Deletion via IDOR
CVE-2026-15939 Simple Restrict < 1.2.9 - Contributor+ Restricted Content Disclosure via REST API
CVE-2026-15241 ChatBot for eCommerce – WoowBot < 4.8.4 - Unauthenticated Gemini API Key Abuse via qcld_ge
CVE-2026-15385 RT Mega Menu < 1.5.2 - Subscriber+ Stored XSS via Menu Item CSS
CVE-2026-12586 Lenxel WP <= 1.0.31 - Unauthenticated Account Takeover via Arbitrary Password Reset
CVE-2026-15236 Gallery for Google Photos < 1.2.1 - Unauthenticated Google OAuth Token Disclosure
CVE-2026-11872 Clever Mega Menu for Visual Composer <= 1.0.1 - Subscriber+ Menu Item Meta Update via save
CVE-2026-16042 LWS Optimize < 3.4 - Subscriber+ Cache Deletion
CVE-2026-16285 WooCommerce Product Attachment < 2.3.3 - Unauthenticated Arbitrary Media Download
CVE-2026-16291 ProfileGrid < 5.9.9.8 - Subscriber+ Arbitrary Notification Deletion via IDOR
CVE-2026-16261 Huge IT Login <= 1.0.4 - Unauthenticated Account Takeover
CVE-2026-16273 Narrative Publisher <= 1.0.7 - Contributor+ Stored XSS via narrative_post_script Post Meta

Showing top 20 of 27 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Simply Schedule Appointments
Same vendor: Unknown

V. Comments for CVE-2026-16540

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