CVE-2026-33877

{
  "id": "CVE-2026-33877",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-15T20:16:35.517",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ApostropheCMS is an open-source Node.js content management system. Versions 4.28.0 and prior contain a timing side-channel vulnerability in the password reset endpoint (/api/v1/@apostrophecms/login/reset-request) that allows unauthenticated username and email enumeration. When a user is not found, the handler returns after a fixed 2-second artificial delay, but when a valid user is found, it performs a MongoDB update and SMTP email send with no equivalent delay normalization, producing measurably different response times. The endpoint also accepts both username and email via an $or query, and has no rate limiting as the existing checkLoginAttempts throttle only applies to the login flow. This enables automated enumeration of valid accounts for use in credential stuffing or targeted phishing. Only instances that have explicitly enabled the passwordReset option are affected, as it defaults to false. This issue has been fixed in version 4.29.0."
    },
    {
      "lang": "es",
      "value": "ApostropheCMS es un sistema de gestión de contenido de código abierto Node.js. Las versiones 4.28.0 y anteriores contienen una vulnerabilidad de canal lateral de tiempo en el endpoint de restablecimiento de contraseña (/API/v1/@apostrophecms/login/reset-request) que permite la enumeración no autenticada de nombres de usuario y correos electrónicos. Cuando no se encuentra un usuario, el gestor devuelve después de un retraso artificial fijo de 2 segundos, pero cuando se encuentra un usuario válido, realiza una actualización de MongoDB y un envío de correo electrónico SMTP sin una normalización de retraso equivalente, produciendo tiempos de respuesta mediblemente diferentes. El endpoint también acepta tanto el nombre de usuario como el correo electrónico a través de una consulta $or, y no tiene rate limiting ya que la limitación checkLoginAttempts existente solo se aplica al flujo de inicio de sesión. Esto permite la enumeración automatizada de cuentas válidas para su uso en credential stuffing o phishing dirigido. Solo las instancias que han habilitado explícitamente la opción passwordReset se ven afectadas, ya que por defecto es false. Este problema ha sido solucionado en la versión 4.29.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "apostrophecms",
          "product": "apostrophe",
          "versions": [
            {
              "version": "< 4.29.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-15T19:30:48.946765Z",
          "id": "CVE-2026-33877",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-208"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:apostrophecms:apostrophecms:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "4.29.0",
              "matchCriteriaId": "2CFAFBDF-2EB1-404B-B370-8C510FC289AE"
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  "references": [
    {
      "url": "https://github.com/apostrophecms/apostrophe/commit/e266cffd8c0d331a9b05c92bf11616556efcdc77",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-mj7r-x3h3-7rmr",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-mj7r-x3h3-7rmr",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ]
    }
  ]
}