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CVE-2022-23527

Status: ModifiedMedium (6.1)—

mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP server. Versions prior to 2.4.12.2 are vulnerable to Open Redirect. When providing a logout parameter to the redirect URI, the existing code in oidc_validate_redirect_url() does not properly check for URLs that start with /\t, leading to an open redirect. This issue has been patched in version 2.4.12.2. Users unable to upgrade can mitigate the issue by configuring mod_auth_openidc to only allow redirection when the destination matches a given regular expression with OIDCRedirectURLsAllowed.

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).

Affected technologies (2)

Debian — Debian LinuxOpenidc — MOD Auth Openidc

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2022-23527",
  "cveTags": [],
  "metrics": {
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          "options": [
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          "timestamp": "2025-04-18T14:22:50.911621Z"
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          "attackComplexity": "LOW",
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      "value": "mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP server. Versions prior to 2.4.12.2 are vulnerable to Open Redirect. When providing a logout parameter to the redirect URI, the existing code in oidc_validate_redirect_url() does not properly check for URLs that start with /\\t, leading to an open redirect. This issue has been patched in version 2.4.12.2. Users unable to upgrade can mitigate the issue by configuring mod_auth_openidc to only allow redirection when the destination matches a given regular expression with OIDCRedirectURLsAllowed."
    },
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      "value": "mod_auth_openidc tiene certificación OpenID? Módulo de autenticación y autorización para el servidor HTTP Apache 2.x. Las versiones anteriores a la 2.4.12.2 son vulnerables a Open Redirect. Al proporcionar un parámetro de cierre de sesión al URI de redireccionamiento, el código existente en oidc_validate_redirect_url() no busca correctamente las URL que comienzan con /\\t, lo que genera un redireccionamiento abierto. Este problema se solucionó en la versión 2.4.12.2. Los usuarios que no puedan actualizar pueden mitigar el problema configurando mod_auth_openidc para permitir solo la redirección cuando el destino coincida con una expresión regular determinada con OIDCRedirectURLsAllowed."
    }
  ],
  "lastModified": "2026-06-17T04:30:18.137",
  "configurations": [
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        {
          "negate": false,
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