CVE-2021-32660

Backstage is an open platform for building developer portals, and techdocs-common contains common functionalities for Backstage's TechDocs. In versions of `@backstage/tehdocs-common` prior to 0.6.4, a malicious internal actor is able to upload documentation content with malicious scripts. These scripts would normally be sanitized by the TechDocs frontend, but by tricking a user to visit the content via the TechDocs API, the content sanitazion will be bypassed. If the TechDocs API is hosted on the same origin as the Backstage app or other backend plugins, this may give access to sensitive data. 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 `0.6.4` release of `@backstage/techdocs-common`.

• CWE-77
• CWE-434

• https://github.com/backstage/backstage/commit/aad98c544e59369901fe9e0a85f6357644dceb5cPatch, Third Party Advisory
• https://github.com/backstage/backstage/releases/tag/release-2021-06-03Patch, Third Party Advisory
• https://github.com/backstage/backstage/security/advisories/GHSA-pwhf-39xg-4rxwThird Party Advisory
• https://github.com/backstage/backstage/commit/aad98c544e59369901fe9e0a85f6357644dceb5cPatch, Third Party Advisory
• https://github.com/backstage/backstage/releases/tag/release-2021-06-03Patch, Third Party Advisory
• https://github.com/backstage/backstage/security/advisories/GHSA-pwhf-39xg-4rxwThird 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.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-32654Nextcloud Server is a Nextcloud package that handles data st…9.1
• CVE-2021-32655Nextcloud Server is a Nextcloud package that handles data st…3.5
• CVE-2021-32656Nextcloud Server is a Nextcloud package that handles data st…8.6
• CVE-2021-32657Nextcloud Server is a Nextcloud package that handles data st…4.3
• CVE-2021-32658Nextcloud Android is the Android client for the Nextcloud op…4.6
• CVE-2021-32659Matrix-appservice-bridge is the bridging service for the Mat…4.9
• CVE-2021-32661Backstage is an open platform for building developer portals…7.3
• CVE-2021-32662Backstage is an open platform for building developer portals…6.5
• CVE-2021-32663iTop is an open source web based IT Service Management tool.…7.5
• CVE-2021-32664Combodo iTop is an open source web based IT Service Manageme…4.8
• CVE-2021-32665wire-ios is the iOS version of Wire, an open-source secure m…6.5
• CVE-2021-32666wire-ios is the iOS version of Wire, an open-source secure m…6.5