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CVE-2020-26214

Status: ModifiedCritical (9.8)—💥 Exploit

In Alerta before version 8.1.0, users may be able to bypass LDAP authentication if they provide an empty password when Alerta server is configure to use LDAP as the authorization provider. Only deployments where LDAP servers are configured to allow unauthenticated authentication mechanism for anonymous authorization are affected. A fix has been implemented in version 8.1.0 that returns HTTP 401 Unauthorized response for any authentication attempts where the password field is empty. As a workaround LDAP administrators can disallow unauthenticated bind requests by clients.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Affected technologies (1)

Alerta Project — Alerta

CWEs

References

Raw JSON (NVD)

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  "id": "CVE-2020-26214",
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          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
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  "published": "2020-11-06T18:15:12.437",
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      "value": "In Alerta before version 8.1.0, users may be able to bypass LDAP authentication if they provide an empty password when Alerta server is configure to use LDAP as the authorization provider. Only deployments where LDAP servers are configured to allow unauthenticated authentication mechanism for anonymous authorization are affected. A fix has been implemented in version 8.1.0 that returns HTTP 401 Unauthorized response for any authentication attempts where the password field is empty. As a workaround LDAP administrators can disallow unauthenticated bind requests by clients."
    },
    {
      "lang": "es",
      "value": "En Alerta versiones anteriores a 8.1.0, los usuarios pueden ser capaces de omitir la autenticación LDAP si proporcionan una contraseña vacía cuando el servidor de Alerta está configurado para usar LDAP como proveedor de autorización.&#xa0;Solo están afectadas las implementaciones en las que los servidores LDAP están configurados para permitir un mecanismo de autenticación no autenticado para la autorización anónima.&#xa0;Una corrección ha sido implementada en la versión 8.1.0, que devuelve una respuesta HTTP 401 no autorizada para cualquier intento de autenticación donde el campo de contraseña está vacío.&#xa0;Como solución alternativa, los administradores de LDAP pueden rechazar las peticiones de vinculación no autenticadas de los clientes"
    }
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  "lastModified": "2026-06-17T03:07:50.250",
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