CVE-2018-8971 Auth bypass in n/a

What is CVE-2018-8971?

CVE-2018-8971 is a critical authentication bypass vulnerability in Debian Debian Linux, published on 24 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The Auth0 integration in GitLab before 10.3.9, 10.4.x before 10.4.6, and 10.5.x before 10.5.6 has an incorrect omniauth-auth0 configuration, leading to signing in unintended users.

Weakness: CWE-20

Which versions are affected by CVE-2018-8971?

It affects 2 products.

Products include Debian Debian Linux, Gitlab Gitlab.

How do I fix CVE-2018-8971?

Upgrade to a fixed version.

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

Is CVE-2018-8971 being exploited?

There is no known exploitation of CVE-2018-8971 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 GHSA-8c6r-xvww-2p23, UBUNTU-CVE-2018-8971.