# CVE-2026-52837: alextselegidis Easy!Appointments information disclosure in reschedule view

Source: https://junglewise.ai/threats/cve-2026-52837-alextselegidis-easy-appointments-information-disclosure-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-14. Updated: 2026-07-29  
License: CC BY 4.0 with a link back

CVE-2026-52837 · Severity: medium · CVSS 4 · Published 2026-07-14

Easy!Appointments, a popular open-source appointment scheduling system, contains a flaw that exposes sensitive customer information. An unauthorized person who obtains a specific booking link can view a customer's full profile, including their email, phone number, physical address, and private notes. This could lead to privacy violations and the exposure of regulated personal data for clinics, salons, and other service providers using the software.

Technologies: [alextselegidis/easyappointments (Packagist)](https://junglewise.ai/threats/technologies/alextselegidis-easyappointments). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2026-52837 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-52837 being exploited in the wild.

**How severe is CVE-2026-52837?** Medium severity, with a CVSS score of 4, published 14 July 2026.

**Which products and versions are affected?** alextselegidis/easyappointments (Packagist) <= 1.5.2, ECOSYSTEM:introduced=0,last_affected=1.5.2.

**Is there a fix for CVE-2026-52837?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-52837 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-52837?** Check whether you run alextselegidis/easyappointments (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An information disclosure vulnerability exists in Easy!Appointments <= 1.5.2 within the booking reschedule component. The `Booking::index()` controller in `application/controllers/Booking.php` retrieves a full customer record from the database using `Customers_model::find()` without field projection or whitelisting. This entire record is then embedded as an inline JavaScript object in the HTML response. An unauthenticated attacker with a valid 12-character `appointment_hash` (often found in emails or logs) can access sensitive fields including email, phone, address, LDAP DN, and internal notes. As of the advisory date, no official patch is available, but operators can mitigate the risk by disabling reschedule links in email templates.

## Affected products

- alextselegidis Easy!Appointments <= 1.5.2

## Identifiers

- CVE-2026-52837
- GHSA-xgr6-pqjv-3pf8

## Timeline

- 2026-06-15: disclosed: Initial disclosure on GitHub Advisories
- 2026-07-29: advisory: Advisory updated and published

## References

- [https://api.github.com/users/peoplstar](https://api.github.com/users/peoplstar)
- [https://github.com/peoplstar](https://github.com/peoplstar)
- [https://api.github.com/users/peoplstar/gists%7B/gist_id%7D](https://api.github.com/users/peoplstar/gists%7B/gist_id%7D)
- [https://api.github.com/users/peoplstar/repos](https://api.github.com/users/peoplstar/repos)
- [https://avatars.githubusercontent.com/u/78135526?v=4](https://avatars.githubusercontent.com/u/78135526?v=4)
- [https://api.github.com/users/peoplstar/events%7B/privacy%7D](https://api.github.com/users/peoplstar/events%7B/privacy%7D)

## Related threats

- [Easy!Appointments excessive data exposure in customer search](https://junglewise.ai/threats/cve-2026-55651-easy-appointments-excessive-data-exposure-in-customer-search)
- [Easy!Appointments authorization bypass in Google OAuth provider binding](https://junglewise.ai/threats/cve-2026-52841-easy-appointments-authorization-bypass-in-google-oauth-provider)
- [alextselegidis Easy!Appointments SSRF in CalDAV connection test](https://junglewise.ai/threats/cve-2026-52840-alextselegidis-easy-appointments-ssrf-in-caldav-connection-test)
- [Easy!Appointments authorization bypass in appointment store and update](https://junglewise.ai/threats/cve-2026-52839-easy-appointments-authorization-bypass-in-appointment-store-and)
- [Easy!Appointments stored XSS in booking disabled message](https://junglewise.ai/threats/cve-2026-52838-easy-appointments-stored-xss-in-booking-disabled-message)