CVE-2019-11187 Auth bypass in n/a

What is CVE-2019-11187?

CVE-2019-11187 is a critical authentication bypass vulnerability in Debian Debian Linux, published on 15 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-287

Which versions are affected by CVE-2019-11187?

It affects 2 products.

Products include Debian Debian Linux, Gonicus Gosa.

How do I fix CVE-2019-11187?

Apply the vendor's patch.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2019-11187 being exploited?

There is no known exploitation of CVE-2019-11187 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-11187, DLA-1875-1, DLA-1876-1, GHSA-9f66-x3qx-v4cg, UBUNTU-CVE-2019-11187.