CVE-2021-32661

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`.

• CWE-77
• CWE-434

• https://github.com/backstage/backstage/commit/aad98c544e59369901fe9e0a85f6357644dceb5cPatch, Third Party Advisory
• https://github.com/backstage/backstage/releases/tag/release-2021-06-03Third Party Advisory
• https://github.com/backstage/backstage/security/advisories/GHSA-gg96-f8wr-p89fThird Party Advisory
• https://github.com/backstage/backstage/commit/aad98c544e59369901fe9e0a85f6357644dceb5cPatch, Third Party Advisory
• https://github.com/backstage/backstage/releases/tag/release-2021-06-03Third Party Advisory
• https://github.com/backstage/backstage/security/advisories/GHSA-gg96-f8wr-p89fThird Party Advisory

Published

Jun 3, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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