What is CVE-2023-38327?

CVE-2023-38327 is a medium-severity vulnerability in Egroupware, classified under Observable Discrepancy. CVSS score: 5.3/10. Published 2025-07-11.

How severe is CVE-2023-38327?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Egroupware

CVE-2023-38327

An issue was discovered in eGroupWare 17.1.20190111. A User Enumeration vulnerability exists under calendar/freebusy.php, which allows unauthenticated remote attackers to enumerate the users of web applications based on server response.

Published 2025-07-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (20.6th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Egroupware — versions 17.1.20190111

Weakness classification (CWE)

CWE-203 — Observable Discrepancy

References

www.gruppotim.it/it/footer/red-team.html (Third Party Advisory)

Frequently asked questions

What is CVE-2023-38327?: CVE-2023-38327 is a medium-severity vulnerability in Egroupware, classified under Observable Discrepancy. CVSS score: 5.3/10. Published 2025-07-11.
How severe is CVE-2023-38327?: Medium severity. CVSS v3 base score is 5.3 out of 10.