CVE-2016-4340
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 10.1%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 10.14% probability · 96th percentile
- Public exploits
- 1 in Exploit-DB · first 15 August 2016
- CISA KEV
- Not listed
- Weakness
- CWE-264
- Affected
- gitlab/gitlab
- Source
- cve@mitre.org
EPSS moved from 7.8% on 21 September 2026 to 10.1% on 4 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/138368/GitLab-Impersonate-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- https://about.gitlab.com/2016/05/02/cve-2016-4340-patches/Mitigation, Patch, Vendor Advisory
- https://gitlab.com/gitlab-org/gitlab-ce/issues/15548Issue Tracking, Patch, Vendor Advisory
- https://www.exploit-db.com/exploits/40236/Exploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/138368/GitLab-Impersonate-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- https://about.gitlab.com/2016/05/02/cve-2016-4340-patches/Mitigation, Patch, Vendor Advisory
- https://gitlab.com/gitlab-org/gitlab-ce/issues/15548Issue Tracking, Patch, Vendor Advisory
- https://www.exploit-db.com/exploits/40236/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.