CVE-2021-39911

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-05 · updated 2026-06-17

Description

An improper access control flaw in all versions of GitLab CE/EE starting from 13.9 before 14.2.6, all versions starting from 14.3 before 14.3.4, and all versions starting from 14.4 before 14.4.1 exposes private email address of Issue and Merge Requests assignee to Webhook data consumers

Affected products

GitLab: from 13.9.0 before 14.2.6; from 14.3.0 before 14.3.4 — fixed in 14.2.6, 14.3.4

How to fix

Upgrade to a fixed version: GitLab 14.2.6, 14.3.4. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39911.json
https://gitlab.com/gitlab-org/gitlab/-/issues/297470
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39911.json
https://gitlab.com/gitlab-org/gitlab/-/issues/297470

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