CVE-2023-2104Public exploitNetwork attack vector

Cross-provider appointment access via unfiltered calendar response

Published Apr 15, 2023 · Updated Feb 6, 2025

Improper access control in Easy!Appointments before 1.5.0 allows remote authenticated users to view and edit other providers' appointments. Calendar::get_calendar_appointments returns appointments and unavailability records without filtering them by the session user or a secretary's assigned providers. Provider or secretary access is required, exposing other providers' scheduling details and allowing appointment records to be changed.

CVSS severity5.4
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Easy!Appointments before 1.5.0 allows remote authenticated users to view and edit other providers' appointments. Calendar::get_calendar_appointments returns appointments and unavailability records without filtering them by the session user or a secretary's assigned providers. Provider or secretary access is required, exposing other providers' scheduling details and allowing appointment records to be changed.

The record

CVE
CVE-2023-2104
Published
Apr 15, 2023
Updated
Feb 6, 2025
Vendor
Alex Tselegidis
Product
Easy!Appointments
Classifications
CWE-284, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <1.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Alex Tselegidis · Easy!Appointmentsversion=unspecified <1.5.0

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
5.4huntr.devCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

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

Technologies

Your stack

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Your stack

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