2.7

CVE-2026-52840: alextselegidis easyappointments Server-Side Request Forgery (SSRF)

CVSS: 2.7v3.1LowDeferred
Published 14-07-2026Last modified 15-07-2026
Open JSON

Vulnerability summary

CVE-2026-52840 is a low (CVSS 2.7) Server-Side Request Forgery (SSRF) vulnerability in alextselegidis easyappointments. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 22.5% of scored vulnerabilities.

Overall risk
11/100
0100
Low · default modelHow is this calculated?
CVSS score
2.7/10
010
Low · v3.1 (CVE.org)
EPSS score
0.31%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-07-2026
    PublishedVulnerability first disclosed.
  2. 15-07-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

0.00 pp

From 0.31% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.31%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Alextselegidis1 product

1 vendor · 1 product

References

2 links