CVE-2026-52840
LOWEasy!Appointments has server-side request forgery in CalDAV connection test that exposes the deployment's internal network
Title source: cnaDescription
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.
References (2)
Core 2
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-pm5p-7w5h-jm5q
X_Refsource_Misc x_refsource_misc
https://github.com/alextselegidis/easyappointments/commit/6eb9336a91cfb276379506625e81f5bd9ed3a536
Scores
CVSS v3
2.7
EPSS
0.0019
EPSS Percentile
8.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-918
Status
published
Products (2)
alextselegidis/easyappointments
0 - 1.5.2Packagist
alextselegidis/easyappointments
< 1.6.0
Published
Jul 14, 2026
Tracked Since
Jul 14, 2026