En resumen
- CVE-2021-43776 es una vulnerabilidad MEDIO (CVSS 6.1) que afecta a auth backend (linuxfoundation), @backstage/plugin-auth-backend.
- Probabilidad de explotación en los próximos 30 días (EPSS): 0.68%, mayor que el 52.3% de las vulnerabilidades.
- Solución: actualizar a 0.4.9 o posterior.
Description
Impact
This vulnerability 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.
Patches
This is vulnerability is patched in version 0.4.9 of @backstage/plugin-auth-backend.
For more information
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NVD 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`.
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