CVE-2023-3285Network attack vector

Unauthorized appointment creation via missing ownership checks

Published Jul 9, 2024 · Updated Aug 2, 2024

Broken object-level authorization in Easy!Appointments before 1.5.0 allows remote authenticated users to create appointments for any user. The POST /appointments API endpoint accepts user-controlled ownership fields without verifying that the caller is authorized for the referenced user. Any low-privileged logged-in role can therefore insert appointment records under another user, including an administrator, causing unauthorized scheduling-data writes.

CVSS severity7.7
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Broken object-level authorization in Easy!Appointments before 1.5.0 allows remote authenticated users to create appointments for any user. The POST /appointments API endpoint accepts user-controlled ownership fields without verifying that the caller is authorized for the referenced user. Any low-privileged logged-in role can therefore insert appointment records under another user, including an administrator, causing unauthorized scheduling-data writes.

The record

CVE
CVE-2023-3285
Published
Jul 9, 2024
Updated
Aug 2, 2024
Vendor
Alex Tselegidis
Product
Easy!Appointments
Classifications
CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.5.0
  2. Affected versionversion=* <1.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Alex Tselegidis · Easy!Appointmentsversion=0 <1.5.0; version=* <1.5.0

Published CVSS scores

7.7Palo Alto NetworksCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo