What is CVE-2019-11187?

CVE-2019-11187 is a critical-severity vulnerability in Gonicus Gosa, classified under Improper Authentication. CVSS score: 9.8/10. Published 2019-08-15.

How severe is CVE-2019-11187?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Gonicus Gosa

CVE-2019-11187

Incorrect Access Control in the LDAP class of GONICUS GOsa through 2019-04-11 allows an attacker to log into any account with a username containing the case-insensitive substring "success" when an arbitrary password is provided.

Vulnerability class: Broken Authentication

Published 2019-08-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (77.1th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Gonicus Gosa
Debian Linux — versions 8.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/gonicus/gosa/commits/master (Patch, Third Party Advisory)
lists.debian.org/debian-lts-announce/2019/08/msg00009.html (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2019-11187?: CVE-2019-11187 is a critical-severity vulnerability in Gonicus Gosa, classified under Improper Authentication. CVSS score: 9.8/10. Published 2019-08-15.
How severe is CVE-2019-11187?: Critical severity. CVSS v3 base score is 9.8 out of 10.