CVE-2020-2228
Improper authorization of users and groups with the same base name in Jenkins GitLab Authentication Plugin
Jenkins Gitlab Authentication Plugin 1.5 and earlier does not perform group authorization checks properly, resulting in a privilege escalation vulnerability.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Jenkins Gitlab Authentication Plugin 1.5 and earlier does not perform group authorization checks properly, resulting in a privilege escalation vulnerability.
- Record
CVE-2020-2228- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-863
- Updated
- 2026-11-02
CVE List No score
Jenkins Gitlab Authentication Plugin 1.5 and earlier does not perform group authorization checks properly, resulting in a privilege escalation vulnerability.
- Record
CVE-2020-2228- Updated
- 2026-11-02
EUVDEUVD-2022-5014 No score
Jenkins Gitlab Authentication Plugin 1.5 and earlier does not perform group authorization checks properly, resulting in a privilege escalation vulnerability.
- Record
EUVD-2022-5014- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qq38-mxpq-rrpj
Improper authorization of users and groups with the same base name in Jenkins GitLab Authentication Plugin
GitLab Authentication Plugin 1.5 and earlier does not differentiate between user names and hierarchical group names when performing authorization. This allows an attacker with permissions to create groups in GitLab to gain the privileges granted to another user or group.
GitLab Authentication Plugin 1.6 performs user name and group name authorization checks using the appropriate GitLab APIs.
- Record
GHSA-qq38-mxpq-rrpj- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV
Jenkins Gitlab Authentication Plugin 1.5 and earlier does not perform group authorization checks properly, resulting in a privilege escalation vulnerability.
- Record
CVE-2020-2228- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-qq38-mxpq-rrpj
Improper authorization of users and groups with the same base name in Jenkins GitLab Authentication Plugin
GitLab Authentication Plugin 1.5 and earlier does not differentiate between user names and hierarchical group names when performing authorization. This allows an attacker with permissions to create groups in GitLab to gain the privileges granted to another user or group.
GitLab Authentication Plugin 1.6 performs user name and group name authorization checks using the appropriate GitLab APIs.
- Record
GHSA-qq38-mxpq-rrpj- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-863
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.jenkins-ci.plugins:gitlab-oauthMaven |
through 1.5 | 1.6 |
org.jenkins-ci.plugins:gitlab-oauthMaven |
before 1.6, plus listed versions 1.0.31.0.41.0.51.0.61.0.7 Show 7 moreShow less1.0.81.0.91.11.21.31.41.5 |
1.6 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-2228 is a high vulnerability (CVSS 8.8) in Jenkins Gitlab Authentication, published July 15, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.43%, the 73rd percentile. Fixed in org.jenkins-ci.plugins:gitlab-oauth 1.6.