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.

• CWE-264

• 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

Published

Jan 23, 2017

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2016-4333The HDF5 1.8.16 library allocating space for the array using…
• CVE-2016-4334Jive before 2016.3.1 has an open redirect from the external-…6.1
• CVE-2016-4335An exploitable buffer overflow exists in the XLS parsing of …
• CVE-2016-4336An exploitable out-of-bounds write exists in the Bzip2 parsi…
• CVE-2016-4337SQL injection vulnerability in the mgr.login.php file in Kto…
• CVE-2016-4338The mysql user parameter configuration script (userparameter…
• CVE-2016-4341NetApp Clustered Data ONTAP before 8.3.2P7 allows remote att…
• CVE-2016-4342ext/phar/phar_object.c in PHP before 5.5.32, 5.6.x before 5.…
• CVE-2016-4343The phar_make_dirstream function in ext/phar/dirstream.c in …8.8
• CVE-2016-4344Integer overflow in the xml_utf8_encode function in ext/xml/…9.8
• CVE-2016-4345Integer overflow in the php_filter_encode_url function in ex…9.8
• CVE-2016-4346Integer overflow in the str_pad function in ext/standard/str…9.8