What is CVE-2023-24599?

CVE-2023-24599 is a medium-severity vulnerability in Open-Xchange Ox App Suite, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 4.3/10. Published 2023-05-29.

How severe is CVE-2023-24599?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Open-Xchange Ox App Suite

CVE-2023-24599

OX App Suite before backend 7.10.6-rev37 allows authenticated users to change the appointments of arbitrary users via conflicting ID numbers, aka "ID confusion."

Published 2023-05-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (40.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Open-Xchange Ox App Suite — versions 7.10.6

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

open-xchange.com (Product)
seclists.org/fulldisclosure/2023/May/3 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2023-24599?: CVE-2023-24599 is a medium-severity vulnerability in Open-Xchange Ox App Suite, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 4.3/10. Published 2023-05-29.
How severe is CVE-2023-24599?: Medium severity. CVSS v3 base score is 4.3 out of 10.