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CVE-2025-27773

Estado: AplazadaAlta (8.6)—

The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. Prior to versions 4.17.0 and 5.0.0-alpha.20, there is a signature confusion attack in the HTTPRedirect binding. An attacker with any signed SAMLResponse via the HTTP-Redirect binding can cause the application to accept an unsigned message. Versions 4.17.0 and 5.0.0-alpha.20 contain a fix for the issue.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad en binding HTTPRedirect que permite falsificar SAML sin firma (CWE-347). Atacante remoto sin autenticación fuerza aceptación de mensaje sin verificación, comprometiendo integridad de autenticación SAML.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementActive Directory ConfigurationVulnerability ScanningUser Account ManagementRestrict Registry PermissionsPassword Policies

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Simplesamlphp — Saml2AI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-27773",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-27773",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-03-11T19:26:31.017558Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.6,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "simplesamlphp",
          "product": "saml2",
          "versions": [
            {
              "status": "affected",
              "version": "< 4.17.0"
            },
            {
              "status": "affected",
              "version": ">= 5.0.0-alpha.1, < 5.0.0-alpha.20"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-03-11T19:15:43.677",
  "references": [
    {
      "url": "https://github.com/simplesamlphp/saml2/blob/9545abd0d9d48388f2fa00469c5c1e0294f0303e/src/SAML2/HTTPRedirect.php#L104-L113",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/simplesamlphp/saml2/blob/9545abd0d9d48388f2fa00469c5c1e0294f0303e/src/SAML2/HTTPRedirect.php#L178-L217",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/simplesamlphp/saml2/commit/7867d6099dc7f31bed1ea10e5bea159c5623d2a0",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/simplesamlphp/saml2/security/advisories/GHSA-46r4-f8gj-xg56",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00013.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. Prior to versions 4.17.0 and 5.0.0-alpha.20, there is a signature confusion attack in the HTTPRedirect binding. An attacker with any signed SAMLResponse via the HTTP-Redirect binding can cause the application to accept an unsigned message. Versions 4.17.0 and 5.0.0-alpha.20 contain a fix for the issue."
    },
    {
      "lang": "es",
      "value": "La librería SimpleSAMLphp SAML2 es una librería PHP para funcionalidades relacionadas con SAML2. En versiones anteriores a la 4.17.0 y la 5.0.0-alpha.20, existía un ataque de confusión de firmas en el enlace HTTPRedirect. Un atacante con cualquier SAMLResponse firmada mediante el enlace HTTP-Redirect podía provocar que la aplicación aceptara un mensaje sin firmar. Las versiones 4.17.0 y 5.0.0-alpha.20 incluyen una solución para este problema."
    }
  ],
  "lastModified": "2026-06-17T09:04:11.953",
  "sourceIdentifier": "security-advisories@github.com"
}