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CVE-2021-32661— TechDocs object element script injection

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.

backstage是一个应用软件。后台是一个开放的平台,用于构建开发者门户 backstage 中 plugin-techdocs 0.9.5之前的版本存在代码问题漏洞，该漏洞源于内部参与者可以通过一个“object”元素来上传带有恶意脚本的文档内容。当其他用户访问同一文档页面时，这可能会允许其访问敏感数据。

CVSS 6.8 · Medium EPSS 1.21% · P68
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I. Basic Information for CVE-2021-32661

Vulnerability Information
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Vulnerability Title
TechDocs object element script injection
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open platform for building developer portals. In versions of Backstage's Techdocs Plugin (`@backstage/plugin-techdocs`) prior to 0.9.5, a malicious internal actor can potentially upload documentation content with malicious scripts by embedding the script within an `object` element. This may give access to sensitive data when other users visit that same documentation page. The ability to upload malicious content may be limited by internal code review processes, unless the chosen TechDocs deployment method is to use an object store and the actor has access to upload files directly to that store. The vulnerability is patched in the `0.9.5` release of `@backstage/plugin-techdocs`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
backstage 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
backstage是一个应用软件。后台是一个开放的平台,用于构建开发者门户 backstage 中 plugin-techdocs 0.9.5之前的版本存在代码问题漏洞，该漏洞源于内部参与者可以通过一个“object”元素来上传带有恶意脚本的文档内容。当其他用户访问同一文档页面时，这可能会允许其访问敏感数据。
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 < 0.9.5 -

II. Public POCs for CVE-2021-32661

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III. Intelligence Information for CVE-2021-32661

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Patches & Fixes for CVE-2021-32661 (1)

Vendor Advisories for CVE-2021-32661 (1)

Other References for CVE-2021-32661 (1)

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

CVE-2021-32660 6.8 MEDIUM TechDocs content sanitization bypass
CVE-2021-32662 6.5 MEDIUM TechDocs mkdocs.yml path traversal

IV. Related Vulnerabilities

Same product: backstage
Same vendor: backstage
Same weakness: CWE-77

V. Comments for CVE-2021-32661

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