CVE-2026-52840

Low

Description

Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, `Caldav::connect_to_server` at `application/controllers/Caldav.php:60` hands the request's `caldav_url` to a Guzzle `REPORT` call without scheme or host validation. A logged-in backend user (admin, provider, or secretary) reaches loopback, RFC1918, and link-local hosts on the deployment's network. The Guzzle exception path returns the upstream status code plus ~120 bytes of response body in the JSON `message` field (`Caldav.php:74-78`), so the SSRF is semi-blind. Version 1.6.0 contains a patch.

SeverityLow

CVSS2.7

Exploit probability—

ProductAlextselegidis/easyappointments

PublishedJul 14, 2026

First seenJul 14, 2026

Weakness typeCWE-918Server-side request forgery (SSRF)

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

Product	Affected versions	Fixed in
alextselegidis/easyappointmentsPackagist	v ≤ 1.5.2	—

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