CVE-2026-52837: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in alextselegidis easyappointments
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.
AI Analysis
Technical Summary
CVE-2026-52837 affects Easy!Appointments, a self-hosted appointment scheduler, in versions before 1.6.0. The vulnerability arises because the booking reschedule view at /index.php/booking/reschedule/{appointment_hash} embeds the full customer record as inline JavaScript without requiring authentication or restricting fields. The 12-character appointment_hash is exposed in reschedule emails, confirmation page URLs, and operator calendar links, enabling anyone with this hash to access all columns of the customer's database record (ea_users table). This constitutes an exposure of sensitive information (CWE-200) and improper access control (CWE-639). The issue is fixed in version 1.6.0.
Potential Impact
An attacker who obtains the appointment_hash can access all customer data stored in the ea_users table for that appointment without authentication. This includes potentially sensitive personal information, leading to privacy breaches. The vulnerability does not require user interaction or privileges and is exploitable remotely via knowledge of the hash. There are no known exploits in the wild as of the publication date.
Mitigation Recommendations
Upgrade Easy!Appointments to version 1.6.0 or later, where this vulnerability is patched. Until upgrading, restrict access to reschedule URLs containing appointment_hash values and avoid exposing these hashes in publicly accessible contexts. Patch status is not explicitly confirmed in the advisory, but the vendor states version 1.6.0 contains a fix.
CVE-2026-52837: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in alextselegidis easyappointments
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.
CVSS v4.0
Score 6.9medium
Affected software
pkg:github/alextselegidis/easyappointmentsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-52837 affects Easy!Appointments, a self-hosted appointment scheduler, in versions before 1.6.0. The vulnerability arises because the booking reschedule view at /index.php/booking/reschedule/{appointment_hash} embeds the full customer record as inline JavaScript without requiring authentication or restricting fields. The 12-character appointment_hash is exposed in reschedule emails, confirmation page URLs, and operator calendar links, enabling anyone with this hash to access all columns of the customer's database record (ea_users table). This constitutes an exposure of sensitive information (CWE-200) and improper access control (CWE-639). The issue is fixed in version 1.6.0.
Potential Impact
An attacker who obtains the appointment_hash can access all customer data stored in the ea_users table for that appointment without authentication. This includes potentially sensitive personal information, leading to privacy breaches. The vulnerability does not require user interaction or privileges and is exploitable remotely via knowledge of the hash. There are no known exploits in the wild as of the publication date.
Mitigation Recommendations
Upgrade Easy!Appointments to version 1.6.0 or later, where this vulnerability is patched. Until upgrading, restrict access to reschedule URLs containing appointment_hash values and avoid exposing these hashes in publicly accessible contexts. Patch status is not explicitly confirmed in the advisory, but the vendor states version 1.6.0 contains a fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-08T18:41:27.723Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a56534168715ace43bba812
Added to database: 07/14/2026, 15:18:25 UTC
Last enriched: 07/29/2026, 21:20:29 UTC
Last updated: 08/22/2026, 23:30:15 UTC
Views: 48
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