Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths.
This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This issue is fixed in versions 0.16.1 and 0.17.8.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
High
Complete data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
@backstage:backend-defaults
backstage:backstage
References 5
https://github.com/backstage/backstage/security/advisories/GHSA-cq7v-rfgc-5c7v
https://github.com/backstage/backstage/security/advisories/GHSA-cq7v-rfgc-5c7v
https://github.com/backstage/backstage/commit/40346245c53e1bf26dee56601e95c5c4a…
https://github.com/backstage/backstage/commit/40346245c53e1bf26dee56601e95c5c4ab9cc124
https://github.com/backstage/backstage/commit/bc80ffdafbc92ff7b8c72347eace13cb8…
https://github.com/backstage/backstage/commit/bc80ffdafbc92ff7b8c72347eace13cb8688fd33
https://github.com/backstage/backstage/releases/tag/v1.49.6
https://github.com/backstage/backstage/releases/tag/v1.49.6
https://github.com/backstage/backstage/releases/tag/v1.54.6
https://github.com/backstage/backstage/releases/tag/v1.54.6