What is the severity of CVE-2021-39891?

CVE-2021-39891 is considered a Medium severity vulnerability due to potential sensitive information disclosure.

How do I fix CVE-2021-39891?

To fix CVE-2021-39891, upgrade to GitLab version 14.1.8, 14.2.6, or 14.3.2 and ensure access tokens are properly cleared.

What versions of GitLab are affected by CVE-2021-39891?

CVE-2021-39891 affects all GitLab CE/EE versions from 8.0.0 up to 14.1.7, as well as specific versions in the 14.2.x and 14.3.x ranges.

What are access tokens in the context of CVE-2021-39891?

Access tokens are credentials used to authenticate user sessions and control access to resources, which if not cleared can lead to data exposure.

Who is impacted by CVE-2021-39891?

Administrators who impersonate users in GitLab are primarily impacted, as their access tokens may remain active post-impersonation.

Vulnerability/
CVE-2021-39891

medium

5.9

CWE

212

5/10/2021

4/8/2024

CVE-2021-39891

First published: Tue Oct 05 2021(Updated: )

In all versions of GitLab CE/EE since version 8.0, access tokens created as part of admin's impersonation of a user are not cleared at the end of impersonation which may lead to unnecessary sensitive info disclosure.

Credit: cve@gitlab.com

Affected Software	Affected Version	How to fix
GitLab	>=8.0.0<14.1.7
GitLab	>=8.0.0<14.1.7
GitLab	>=14.2.0<14.2.5
GitLab	>=14.2.0<14.2.5
GitLab	>=14.3.0<14.3.1
GitLab	>=14.3.0<14.3.1

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Frequently Asked Questions

What is the severity of CVE-2021-39891?
CVE-2021-39891 is considered a Medium severity vulnerability due to potential sensitive information disclosure.
How do I fix CVE-2021-39891?
To fix CVE-2021-39891, upgrade to GitLab version 14.1.8, 14.2.6, or 14.3.2 and ensure access tokens are properly cleared.
What versions of GitLab are affected by CVE-2021-39891?
CVE-2021-39891 affects all GitLab CE/EE versions from 8.0.0 up to 14.1.7, as well as specific versions in the 14.2.x and 14.3.x ranges.
What are access tokens in the context of CVE-2021-39891?
Access tokens are credentials used to authenticate user sessions and control access to resources, which if not cleared can lead to data exposure.
Who is impacted by CVE-2021-39891?
Administrators who impersonate users in GitLab are primarily impacted, as their access tokens may remain active post-impersonation.

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agent/weakness
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agent/description
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source/MITRE
agent/severity
agent/last-modified-date
agent/first-publish-date
agent/event
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/gitlab
canonical/gitlab
version/gitlab/8.0.0
version/gitlab/14.2.0
version/gitlab/14.3.0

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Frequently Asked Questions

What is the severity of CVE-2021-39891?
CVE-2021-39891 is considered a Medium severity vulnerability due to potential sensitive information disclosure.
How do I fix CVE-2021-39891?
To fix CVE-2021-39891, upgrade to GitLab version 14.1.8, 14.2.6, or 14.3.2 and ensure access tokens are properly cleared.
What versions of GitLab are affected by CVE-2021-39891?
CVE-2021-39891 affects all GitLab CE/EE versions from 8.0.0 up to 14.1.7, as well as specific versions in the 14.2.x and 14.3.x ranges.
What are access tokens in the context of CVE-2021-39891?
Access tokens are credentials used to authenticate user sessions and control access to resources, which if not cleared can lead to data exposure.
Who is impacted by CVE-2021-39891?
Administrators who impersonate users in GitLab are primarily impacted, as their access tokens may remain active post-impersonation.