Distribution advisory
This page covers CVE-2023-6840 as tracked by Ubuntu, for the package gitlab. No fixed version has been recorded for this distribution yet.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity high, availability high.
CVSS metrics in full
The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
- Attack vector: Network — reachable from anywhere that can route to the service.
- Attack complexity: Low — the attack works reliably, with no preparation.
- Privileges required: High — administrative rights are needed first.
- User interaction: None — nobody has to be tricked into anything.
- Scope: Unchanged — the damage stays inside the vulnerable component.
- Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
- Integrity impact: High — total loss, or loss the attacker controls.
- Availability impact: High — total loss, or loss the attacker controls.
Weakness class
UBUNTU-CVE-2023-6840 is classified as CWE-862: Missing Authorization. No authorisation check is performed before carrying out a restricted action.
Affected software
UBUNTU-CVE-2023-6840 is recorded against 1 package.
Timeline and source
Published on 7 February 2024 and last revised on 24 October 2025. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
ubuntu.com (Report)
about.gitlab.com (Report)
gitlab.com (Report)
hackerone.com (Report)
www.cve.org (Report)
Other advisories for this package
gitlab has other advisories on record. If you are patching this one, these are worth checking on the same host:
Same weakness in other software
These advisories are the same class of weakness (CWE-862: Missing Authorization) in other software:
