CVE-2021-32662Network attack vector

Authenticated file disclosure via absolute docs_dir path

Published Jun 3, 2021 · Updated Aug 3, 2024

Path traversal in @backstage/techdocs-common before 0.6.3 allows remote authenticated users to read files from TechDocs build hosts. TechdocsGenerator accepted an absolute docs_dir path from mkdocs.yml and let MkDocs copy that directory's contents into published documentation. Exploitation requires permission to modify a documentation source repository and access the TechDocs backend API, which exposes the copied files.

CVSS severity6.5
Medium
EPSS probability1.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in @backstage/techdocs-common before 0.6.3 allows remote authenticated users to read files from TechDocs build hosts. TechdocsGenerator accepted an absolute docs_dir path from mkdocs.yml and let MkDocs copy that directory's contents into published documentation. Exploitation requires permission to modify a documentation source repository and access the TechDocs backend API, which exposes the copied files.

The record

CVE
CVE-2021-32662
Published
Jun 3, 2021
Updated
Aug 3, 2024
Vendor
Backstage
Product
Backstage
Classifications
CWE-22, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Backstage · Backstageversion=< 0.6.3

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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