CVE-2021-39896
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I. Basic Information for CVE-2021-39896
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
In all versions of GitLab CE/EE since version 8.0, when an admin uses the impersonate feature twice and stops impersonating, the admin may be logged in as the second user they impersonated, which may lead to repudiation issues.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
GitLab 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitLab是美国GitLab公司的一款使用Ruby on Rails开发的、自托管的、Git（版本控制系统）项目仓库应用程序。该程序可用于查阅项目的文件内容、提交历史、Bug列表等。 GitLab CE/EE 存在代码问题漏洞，该漏洞可能会导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-39896
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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- https://gitlab.com/gitlab-org/gitlab/-/issues/339362x_refsource_MISC
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39896.jsonx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-39896
Same Patch Batch · GitLab · 2021-10-04 · 12 CVEs total
| CVE-2021-39885 | 8.7 HIGH | GitLab EE 跨站脚本漏洞 |
| CVE-2021-39877 | 7.7 HIGH | GitLab 资源管理错误漏洞 |
| CVE-2021-39868 | 4.3 MEDIUM | GitLab 访问控制错误漏洞 |
| CVE-2021-22259 | 4.3 MEDIUM | GitLab 输入验证错误漏洞 |
| CVE-2021-39874 | 4.3 MEDIUM | GitLab 安全特征问题漏洞 |
| CVE-2021-39883 | 4.3 MEDIUM | GitLab 安全漏洞 |
| CVE-2021-39871 | 4.3 MEDIUM | GitLab 安全特征问题漏洞 |
| CVE-2021-39873 | 4.3 MEDIUM | GitLab CE/EE 安全漏洞 |
| CVE-2021-39899 | 2.9 LOW | GitLab 授权问题漏洞 |
| CVE-2021-39879 | 2.2 LOW | GitLab 访问控制错误漏洞 |
| CVE-2021-39900 | 2.0 LOW | GitLab 日志信息泄露漏洞 |
IV. Related Vulnerabilities
Same product: GitLab
- CVE-2026-3254
Improper Restriction of Rendered UI Layers or Frames in GitL - CVE-2026-4922
Cross-Site Request Forgery (CSRF) in GitLab - CVE-2025-0186
Allocation of Resources Without Limits or Throttling in GitL - CVE-2025-3922
Allocation of Resources Without Limits or Throttling in GitL - CVE-2025-6016
Allocation of Resources Without Limits or Throttling in GitL
Same vendor: GitLab
- CVE-2026-3254
Improper Restriction of Rendered UI Layers or Frames in GitL - CVE-2026-4922
Cross-Site Request Forgery (CSRF) in GitLab - CVE-2025-0186
Allocation of Resources Without Limits or Throttling in GitL - CVE-2025-3922
Allocation of Resources Without Limits or Throttling in GitL - CVE-2025-6016
Allocation of Resources Without Limits or Throttling in GitL
V. Comments for CVE-2021-39896
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