CVE-2021-22242
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I. Basic Information for CVE-2021-22242
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
Insufficient input sanitization in Mermaid markdown in GitLab CE/EE version 11.4 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
GitLab 跨站脚本漏洞
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 存在跨站脚本漏洞，该漏洞源于 GitLab CE/EE 11.4 版本及更高版本中对 Mermaid Markdown 的输入清理不足，允许攻击者通过特制的 Markdown 造成存储型跨站脚本漏洞。
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-2021-22242
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22242.jsonx_refsource_CONFIRM
- https://hackerone.com/reports/1212822x_refsource_MISC
- https://gitlab.com/gitlab-org/gitlab/-/issues/332528x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-22242
Same Patch Batch · GitLab · 2021-08-25 · 9 CVEs total
| CVE-2021-22237 | 6.6 MEDIUM | GitLab 授权问题漏洞 |
| CVE-2021-22236 | 5.5 MEDIUM | GitLab 输入验证错误漏洞 |
| CVE-2021-22256 | 5.4 MEDIUM | GitLab 安全漏洞 |
| CVE-2021-22250 | 5.4 MEDIUM | GitLab 安全漏洞 |
| CVE-2021-22243 | 5.0 MEDIUM | GitLab 安全漏洞 |
| CVE-2021-22247 | 4.3 MEDIUM | GitLab 权限许可和访问控制问题漏洞 |
| CVE-2021-22244 | 3.1 LOW | GitLab 安全漏洞 |
| CVE-2021-22245 | 2.7 LOW | GitLab 输入验证错误漏洞 |
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-2021-22242
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