What is CVE-2020-15003?

CVE-2020-15003 is a medium-severity vulnerability in Open-Xchange Appsuite. CVSS score: 4.3/10. Published 2020-10-23.

How severe is CVE-2020-15003?

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

Vulnerability in Open-Xchange Appsuite

CVE-2020-15003

OX App Suite through 7.10.3 allows Information Exposure because a user can obtain the IP address and User-Agent string of a different user (via the session API during shared Drive access).

Published 2020-10-23 · 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:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.7th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Open-Xchange Appsuite — versions 7.10.2, 7.10.3

References

www.open-xchange.com/ (Product)
seclists.org/fulldisclosure/2020/Oct/20 (Exploit, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-15003?: CVE-2020-15003 is a medium-severity vulnerability in Open-Xchange Appsuite. CVSS score: 4.3/10. Published 2020-10-23.
How severe is CVE-2020-15003?: Medium severity. CVSS v3 base score is 4.3 out of 10.