Path Traversal in Backstage
CVE-2021-32662
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`.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.013 (68.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Backstage — versions < 0.6.3
- Linuxfoundation Backstage
Weakness classification (CWE)
References
- github.com/backstage/backstage/security/advisories/GHSA-pgf8-28gg-vpr6 (Third Party Advisory)
- github.com/backstage/backstage/commit/8cefadca04cbf01d0394b0cb1983247e5f1d6208 (Patch, Third Party Advisory)
- github.com/backstage/backstage/releases/tag/release-2021-05-27 (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2021-32662?
- CVE-2021-32662 is a medium-severity vulnerability in Backstage, classified under Path Traversal. CVSS score: 6.5/10. Published 2021-06-03.
- How severe is CVE-2021-32662?
- Medium severity. CVSS v3 base score is 6.5 out of 10.