CVE-2021-32660
In versions of `@backstage/tehdocs-common` prior to 0.6.4, a malicious internal actor is able to upload documentation content with malicious scripts.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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`.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- EPSS
- 1.27% probability · 68th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-77, CWE-434
- Affected
- linuxfoundation/\@backstage\/techdocs-common
- Source
- security-advisories@github.com
References
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.