Description
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`.
Published: 2021-11-26
Score: 7.4 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-2600 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`.
Github GHSA Github GHSA GHSA-w7fj-336r-vw49 Cross-Site Scripting vulnerability in @backstage/plugin-auth-backend
History

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Subscriptions

Linuxfoundation Auth Backend
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2024-08-04T04:03:08.688Z

Reserved: 2021-11-16T00:00:00.000Z

Link: CVE-2021-43776

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-11-26T19:15:07.843

Modified: 2024-11-21T06:29:45.807

Link: CVE-2021-43776

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses