Vulnerabilities > CVE-2021-43776 - Unspecified vulnerability in Linuxfoundation Auth Backend

CVSS 6.1 - MEDIUM

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

LOW

Integrity impact

LOW

Availability impact

NONE

network

low complexity

linuxfoundation

NVD

Published: 2021-11-26

Updated: 2024-11-21

Summary

Backstage is an open platform for building developer portals. In affected versions the auth-backend plugin allows a malicious actor to trick another user into visiting a vulnerable URL that executes an XSS attack. This attack can potentially allow the attacker to exfiltrate access tokens or other secrets from the user's browser. The default CSP does prevent this attack, but it is expected that some deployments have these policies disabled due to incompatibilities. This is vulnerability is patched in version `0.4.9` of `@backstage/plugin-auth-backend`.

Vulnerable Configurations

Part	Description	Count
Application	Linuxfoundation Linuxfoundation Auth Backend 0.1.1 Linuxfoundation Auth Backend 0.2.0 Linuxfoundation Auth Backend 0.2.1 Linuxfoundation Auth Backend 0.2.2 Linuxfoundation Auth Backend 0.2.3 Linuxfoundation Auth Backend 0.2.4 Linuxfoundation Auth Backend 0.2.5 Linuxfoundation Auth Backend 0.2.6 Linuxfoundation Auth Backend 0.2.7 Linuxfoundation Auth Backend 0.2.8 Linuxfoundation Auth Backend 0.2.9 Linuxfoundation Auth Backend 0.2.10 Linuxfoundation Auth Backend 0.2.11 Linuxfoundation Auth Backend 0.2.12 Linuxfoundation Auth Backend 0.3.0 Linuxfoundation Auth Backend 0.3.1 Linuxfoundation Auth Backend 0.3.2 Linuxfoundation Auth Backend 0.3.3 Linuxfoundation Auth Backend 0.3.4 Linuxfoundation Auth Backend 0.3.5 Linuxfoundation Auth Backend 0.3.6 Linuxfoundation Auth Backend 0.3.7 Linuxfoundation Auth Backend 0.3.8 Linuxfoundation Auth Backend 0.3.9 Linuxfoundation Auth Backend 0.3.10 Linuxfoundation Auth Backend 0.3.11 Linuxfoundation Auth Backend 0.3.12 Linuxfoundation Auth Backend 0.3.13 Linuxfoundation Auth Backend 0.3.14 Linuxfoundation Auth Backend 0.3.15 Linuxfoundation Auth Backend 0.3.16 Linuxfoundation Auth Backend 0.3.17 Linuxfoundation Auth Backend 0.3.18 Linuxfoundation Auth Backend 0.3.19 Linuxfoundation Auth Backend 0.3.20 Linuxfoundation Auth Backend 0.3.21 Linuxfoundation Auth Backend 0.3.22 Linuxfoundation Auth Backend 0.3.23 Linuxfoundation Auth Backend 0.3.24 Linuxfoundation Auth Backend 0.4.0 Linuxfoundation Auth Backend 0.4.1 Linuxfoundation Auth Backend 0.4.2 Linuxfoundation Auth Backend 0.4.3 Linuxfoundation Auth Backend 0.4.4 Linuxfoundation Auth Backend 0.4.5 Linuxfoundation Auth Backend 0.4.6 Linuxfoundation Auth Backend 0.4.7 Linuxfoundation Auth Backend 0.4.8	66

Summary

Vulnerable Configurations

References