🛡️ CVE-2021-39881 on Ubuntu — gitlab

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

In all versions of GitLab CE/EE since version 7.7, the application may let a malicious user create an OAuth client application with arbitrary scope names which may allow the malicious user to trick unsuspecting users to authorize the malicious client application using the spoofed scope name and description.

Distribution advisory

This page covers CVE-2021-39881 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 low-level privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability none.

Affected software and timeline

Affected software: gitlab. Published on 5 October 2021 and last revised on 24 October 2025. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
hackerone.com (Report)
gitlab.com (Report)
gitlab.com (Report)
www.cve.org (Report)

CVE-2021-39881 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2021-10-05
Updated 2026-06-08
Modified 2025-10-24
Fix URL N/A

Affected Packages

Software From version Fixed in
gitlab — —

Similar Threats

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More UBUNTU CVE 2021 advisories

Part of UBUNTU CVE 2021 in the advisory index.