What is CVE-2018-16838?

CVE-2018-16838 is a medium-severity vulnerability in [Unknown] Sssd, classified under Improper Access Control. CVSS score: 5.4/10. Published 2019-03-25.

How severe is CVE-2018-16838?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Privilege escalation in [Unknown] Sssd

CVE-2018-16838

A flaw was found in sssd Group Policy Objects implementation. When the GPO is not readable by SSSD due to a too strict permission settings on the server side, SSSD will allow all authenticated users to login instead of denying access.

Published 2019-03-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.011 (66.8th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

References

bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
lists.opensuse.org/opensuse-security-announce/2019-06/msg00042.html (vendor-advisory)
lists.opensuse.org/opensuse-security-announce/2019-06/msg00051.html (vendor-advisory)
access.redhat.com/errata/RHSA-2019:2177 (vendor-advisory)
access.redhat.com/errata/RHSA-2019:2437 (vendor-advisory)
access.redhat.com/errata/RHSA-2019:3651 (vendor-advisory)
lists.debian.org/debian-lts-announce/2023/05/msg00028.html

Frequently asked questions

What is CVE-2018-16838?: CVE-2018-16838 is a medium-severity vulnerability in [Unknown] Sssd, classified under Improper Access Control. CVSS score: 5.4/10. Published 2019-03-25.
How severe is CVE-2018-16838?: Medium severity. CVSS v3 base score is 5.4 out of 10.