Vulnerability · Published Oct 5, 2021 · Assigned by GitLab

CVE-2021-39891

Medium 5.9

In plain English

A medium-severity security flaw in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 63% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)1.0%top 36.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
GitLab	GitLab	>=8.0, <14.1.7>=14.2, <14.2.5>=14.3, <14.3.1

References

https://gitlab.com/gitlab-org/gitlab/-/issues/335137 x_refsource_MISC
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39891.json x_refsource_CONFIRM