This security advisory describes one medium risk vulnerability.

1) Permissions, Privileges, and Access Controls

Severity: Medium

5.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C] [PCI]


CWE-264 – Permissions, Privileges, and Access Controls


The vulnerability allows a remote attacker to gain unauthorized access to projects.

The vulnerability exists due to incorrect membership handling of group sharing feature. Sharing a group with another group could grant project access to unauthorized users.


Install updates from vendor’s website.

Vulnerable software versions

Gitlab Community Edition:
12.5.0, 12.5.1, 12.5.2, 12.5.3, 12.5.4, 12.5.5, 12.5.6, 12.5.7, 12.5.9, 12.6.0, 12.6.1, 12.6.2, 12.6.3, 12.6.4, 12.6.6, 12.7.0, 12.7.1, 12.7.2, 12.7.4, 12.7.5

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

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