CVE Vulnerability

CVE-2021-43776

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`.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

6.1 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References
Link Resource
https://github.com/backstage/backstage/security/advisories/GHSA-w7fj-336r-vw49 Third Party Advisory
https://github.com/backstage/backstage/tree/master/plugins/auth-backend Product Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:linuxfoundation:auth_backend:*:*:*:*:*:node.js:*:*
Information

Published : 2021-11-26 07:15

Updated : 2021-11-30 07:11

NVD link : CVE-2021-43776

Mitre link : CVE-2021-43776

Products Affected
No products.
CWE
CWE-79