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CVE-2026-52841

CVE-2026-52841 · Easy!Appointments: Authorization bypass in Google OAuth provider binding lets any backend user rebind a peer provider's Google sync

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, `Google::oauth` at `application/controllers/Google.php:278` stores its URL-supplied `provider_id` in the session, and `oauth_callback` saves the issued Google OAuth token against that row without checking the caller owns the provider. Any logged-in backend user (admin, provider, or secretary) rebinds a peer provider's Google sync to a Google account they control. The peer's appointments then sync into the attacker's calendar with each customer's name and email attached as attendee data. Version 1.6.0 patches the issue.

CVSS 3.1 · Low · EPSS 0.2%

Published
Updated

Stack: php

Affected products and versions

  • easyappointments

    Versions
    • < 1.6.0: Affected

    No fix published

  • alextselegidis/easyappointments Packagist

    Versions
    • 1.1.0
    • 1.1.0-beta.1
    • 1.1.0-beta.2
    • 1.1.1
    • 1.2.0
    • 1.2.0-alpha.1
    • 1.2.0-beta.1
    • 1.2.1
    • 1.3.0
    • 1.3.0-alpha.1
    • 1.3.0-beta.1
    • 1.3.0-beta.2
    • 1.3.1
    • 1.3.1-beta.1
    • 1.3.2
    • 1.3.2-beta.1
    • 1.4.0
    • 1.4.0-beta.1
    • 1.4.1
    • 1.4.2
    • 1.4.2-beta.1
    • 1.4.3
    • 1.4.3-beta.1
    • 1.5.2
    Affected ranges
    • ECOSYSTEM: ≤ 1.5.2

    No fix published

Original sources

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