CVE-2026-52837— Easy!Appointments has unauthenticated customer PII disclosure on booking reschedule page
Possible ATT&CK Techniques 1AI
T1530 · Data from Cloud StorageAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| alextselegidis | easyappointments | < 1.6.0 | affected |
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I. Basic Information for CVE-2026-52837
Vulnerability Information
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Vulnerability Title
Easy!Appointments has unauthenticated customer PII disclosure on booking reschedule page
Source: NVD (National Vulnerability Database)
Vulnerability Description
Easy!Appointments is a self hosted appointment scheduler. In versions up to and including 1.5.2, the booking reschedule view at `/index.php/booking/reschedule/{appointment_hash}` (handled by `Booking::index()`) embeds the entire customer record as inline JavaScript (`const vars = {... "customer_data": {...}, ...}`) without authentication and without field whitelisting. Anyone in possession of the 12-character `appointment_hash` — which appears in plain text in reschedule emails, confirmation page URLs, and operator-side calendar links — can read every column of that customer's row in the `ea_users` table. Version 1.6.0 contains a patch.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Alex Tselegidis Easy!Appointments 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Alex Tselegidis Easy!Appointments是Alex Tselegidis个人开发者的一个在线预约系统。 Alex Tselegidis Easy!Appointments 1.5.2及之前版本存在安全漏洞，该漏洞源于预订重新安排视图将完整的客户记录嵌入为内联JavaScript，未进行身份验证和字段白名单过滤，导致任何拥有12字符appointment_hash的人均可读取ea_users表中该客户行的所有列。
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 |
|---|---|---|---|---|
| alextselegidis | easyappointments | < 1.6.0 | - |
II. Public POCs for CVE-2026-52837
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-52837 (2)
Vendor Advisories for CVE-2026-52837 (1)
Same Patch Batch · alextselegidis · 2026-07-14 · 6 CVEs total
| CVE-2026-55651 | 7.1 HIGH | Easy!Appointments Vulnerable to Appointments Takeover via Excessive Data Exposure |
| CVE-2026-52839 | 3.3 LOW | Easy!Appointments appointments/store and appointments/update allow cross-provider appointm |
| CVE-2026-52841 | 3.1 LOW | Easy!Appointments: Authorization bypass in Google OAuth provider binding lets any backend |
| CVE-2026-52840 | 2.7 LOW | Easy!Appointments has server-side request forgery in CalDAV connection test that exposes t |
| CVE-2026-52838 | 2.6 LOW | Easy!Appointments disable_booking_message rendered as raw HTML on public booking page — St |
IV. Related Vulnerabilities
Same product: easyappointments
- CVE-2026-55651
Easy!Appointments Vulnerable to Appointments Takeover via Ex - CVE-2026-52841
Easy!Appointments: Authorization bypass in Google OAuth prov - CVE-2026-52840
Easy!Appointments has server-side request forgery in CalDAV - CVE-2026-52839
Easy!Appointments appointments/store and appointments/update - CVE-2026-52838
Easy!Appointments disable_booking_message rendered as raw HT
Same vendor: alextselegidis
- CVE-2026-55651
Easy!Appointments Vulnerable to Appointments Takeover via Ex - CVE-2026-52841
Easy!Appointments: Authorization bypass in Google OAuth prov - CVE-2026-52840
Easy!Appointments has server-side request forgery in CalDAV - CVE-2026-52839
Easy!Appointments appointments/store and appointments/update - CVE-2026-52838
Easy!Appointments disable_booking_message rendered as raw HT
Same weakness: CWE-200
- CVE-2026-47247
libheif Vulnerable to Heap Information Disclosure via Grid I - CVE-2026-56579
HCL MyCloud was affected with Exposure of Sensitive Informat - CVE-2026-56578
HCL MyCloud was affected by Server Version Disclosure - CVE-2026-47395
PraisonAI CLI automatically resolves @url mentions in prompt - CVE-2026-56584
HCL IEM was affected with the Information disclosure nginx s
V. Comments for CVE-2026-52837
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