CVE-2026-52841

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

14/07/2026

Last modified:

14/07/2026

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&#39;s Google sync to a Google account they control. The peer&#39;s appointments then sync into the attacker&#39;s calendar with each customer&#39;s name and email attached as attendee data. Version 1.6.0 patches the issue.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 3.10 LOW
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x

3.10

Severity 3.x

LOW

CVE-2026-52841

Description

Impact

References to Advisories, Solutions, and Tools