CVE-2021-32661
mediumpriority · track · 29EPSS 0.012 · 68 %ileEUUSEPSS · scored 2026-10-27
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`.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.3
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (3)
Products and version ranges known to be affected.
- linuxfoundation @backstage/plugin-techdocs< 0.9.5nvdUScpe:2.3:a:linuxfoundation:\@backstage\/plugin-techdocs:*:*:*:*:*:*:*:*
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-gg96-f8wr-p89fScript injection2021-06-04ghsa · osvUS
### Impact 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. ### Patches The vulnerability is patched in the `0.9.5` release of `@backstage/plugin-techdocs`. ### For more information If you have any questions or comments about this advisory: * Open an issue in the [Backstage repository](https://github.com/backstage/backstage) * Visit our chat, linked to in [Backstage README](https://github.com/backstage/backstage)
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://github.com/backstage/backstage/commit/aad98c544e59369901fe9e0a85f6357644dceb5ccnnvd
- https://github.com/backstage/backstage/releases/tag/release-2021-06-03cnnvd
- https://github.com/backstage/backstage/security/advisories/GHSA-gg96-f8wr-p89fcnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021060704cnnvd
- https://github.com/backstage/backstage/commit/aad98c544e59369901fe9e0a85f6357644dceb5cenisa_euvd
- https://github.com/backstage/backstage/releases/tag/release-2021-06-03enisa_euvd
- https://github.com/backstage/backstage/security/advisories/GHSA-gg96-f8wr-p89fenisa_euvd
- https://github.com/backstage/backstage/commit/aad98c544e59369901fe9e0a85f6357644dceb5cPatchThird Party Advisorynvd
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