CVE-2016-4340

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 10.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2017-01-23 · updated 2026-06-17
Weakness: CWE-264

Description

The impersonate feature in Gitlab 8.7.0, 8.6.0 through 8.6.7, 8.5.0 through 8.5.11, 8.4.0 through 8.4.9, 8.3.0 through 8.3.8, and 8.2.0 through 8.2.4 allows remote authenticated users to "log in" as any other user via unspecified vectors.

Affected products

GitLab: 8.2.0, 8.2.1, 8.2.2, 8.2.3, 8.2.4, 8.3.0 (+39)

References

http://packetstormsecurity.com/files/138368/GitLab-Impersonate-Privilege-Escalation.html
https://about.gitlab.com/2016/05/02/cve-2016-4340-patches/
https://gitlab.com/gitlab-org/gitlab-ce/issues/15548
https://www.exploit-db.com/exploits/40236/
http://packetstormsecurity.com/files/138368/GitLab-Impersonate-Privilege-Escalation.html
https://about.gitlab.com/2016/05/02/cve-2016-4340-patches/
https://gitlab.com/gitlab-org/gitlab-ce/issues/15548
https://www.exploit-db.com/exploits/40236/

Get alerted when CVE-2016-4340 or the next vulnerability affects your stack