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CVE-2021-22242

Quick assessment

Affected
GitLab GitLab
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 8.7 · High EPSS 63.55% · P99

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2021-22242

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab >=11.4, <13.12.9 -

II. Public POCs for CVE-2021-22242

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III. Intelligence Information for CVE-2021-22242

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Other References for CVE-2021-22242 (3)

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
Same vendor: GitLab

V. Comments for CVE-2021-22242

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