CVE-2026-52841
LOW
INFO
Priority: 0.01
BB Relevance:
31/100
Published: 2026-07-14
Modified: 2026-10-24
First seen: 2026-10-29
Status: active
Attack Surface
Network
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
High
UI:
Required
S:
Unchanged
C:
Low
I:
Low
A:
None
Description
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.