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CVE-2021-32662— TechDocs mkdocs.yml path traversal

Quick assessment

Affected
backstage backstage
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NPM Techdocs-common是美国npm（NPM）公司的一个软件包。 Techdocs-common 存在路径遍历漏洞，攻击者可以通过在"mkdocs.yml" 中为"docs_dir"设置特定路径，从构建和发布 TechDocs 文档的环境中读取敏感文件。

CVSS 6.5 · Medium EPSS 1.28% · P69
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I. Basic Information for CVE-2021-32662

Vulnerability Information
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Vulnerability Title
TechDocs mkdocs.yml path traversal
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open platform for building developer portals, and techdocs-common contains common functionalities for Backstage's TechDocs. In `@backstage/techdocs-common` versions prior to 0.6.3, a malicious actor could read sensitive files from the environment where TechDocs documentation is built and published by setting a particular path for `docs_dir` in `mkdocs.yml`. These files would then be available over the TechDocs backend API. This vulnerability is mitigated by the fact that an attacker would need access to modify the `mkdocs.yml` in the documentation source code, and would also need access to the TechDocs backend API. The vulnerability is patched in the `0.6.3` release of `@backstage/techdocs-common`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Techdocs-common 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NPM Techdocs-common是美国npm（NPM）公司的一个软件包。 Techdocs-common 存在路径遍历漏洞，攻击者可以通过在"mkdocs.yml" 中为"docs_dir"设置特定路径，从构建和发布 TechDocs 文档的环境中读取敏感文件。
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
backstage backstage < 0.6.3 -

II. Public POCs for CVE-2021-32662

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III. Intelligence Information for CVE-2021-32662

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Patches & Fixes for CVE-2021-32662 (1)

Vendor Advisories for CVE-2021-32662 (1)

Other References for CVE-2021-32662 (1)

Same Patch Batch · backstage · 2021-06-03 · 3 CVEs total

CVE-2021-32660 6.8 MEDIUM TechDocs content sanitization bypass
CVE-2021-32661 6.8 MEDIUM TechDocs object element script injection

IV. Related Vulnerabilities

Same product: backstage
Same vendor: backstage
Same weakness: CWE-22

V. Comments for CVE-2021-32662

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