CVE-2026-52840
Easy!Appointments has server-side request forgery in CalDAV connection test that exposes the deployment's internal network
- State
- Published
- Severity
- 2.7 Low
- Published
- Jul 14, 2026
- Updated
- Jul 15, 2026
- Reserved
- Jun 8, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 2.7 Low | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N | GitHub_M |
Weaknesses
- CWE-918 Server-Side Request Forgery (SSRF)
Affected Products
| Product | Versions |
|---|---|
easyappointmentsalextselegidis |
|
References
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