{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Speedup Optimization",
          "vendor": "charlycharm",
          "versions": [
            {
              "lessThanOrEqual": "1.5.9",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Speedup Optimization plugin for WordPress is vulnerable to Missing Authorization in all versions up to and including 1.5.9. The `speedup01_ajax_enabled()` function, which handles the `wp_ajax_speedup01_enabled` AJAX action, does not perform any capability check via `current_user_can()` and also lacks nonce verification. This is in contrast to other AJAX handlers in the same plugin (e.g., `speedup01_ajax_install_iox` and `speedup01_ajax_delete_cache_file`) which properly check for `install_plugins` and `manage_options` capabilities respectively. This makes it possible for authenticated attackers, with Subscriber-level access and above, to enable or disable the site\u0027s optimization module by sending a POST request to admin-ajax."
    },
    {
      "lang": "es",
      "value": "El plugin Speedup Optimization para WordPress es vulnerable a la falta de autorizaci\u00f3n en todas las versiones hasta la 1.5.9 inclusive. La funci\u00f3n speedup01_ajax_enabled(), que maneja la acci\u00f3n AJAX wp_ajax_speedup01_enabled, no realiza ninguna comprobaci\u00f3n de capacidad a trav\u00e9s de current_user_can() y tambi\u00e9n carece de verificaci\u00f3n de nonce. Esto contrasta con otros manejadores AJAX en el mismo plugin (por ejemplo, speedup01_ajax_install_iox y speedup01_ajax_delete_cache_file) que comprueban correctamente las capacidades install_plugins y manage_options respectivamente. Esto hace posible que atacantes autenticados, con acceso de nivel Suscriptor y superior, habiliten o deshabiliten el m\u00f3dulo de optimizaci\u00f3n del sitio enviando una solicitud POST a admin-ajax."
    }
  ],
  "id": "CVE-2026-4127",
  "lastModified": "2026-06-17T10:56:01.963",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "security@wordfence.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-4127",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-16T12:51:03.357443Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-21T04:17:41.393",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/speedup-optimization/tags/1.5.9/speedup-optimization.php#L172"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/speedup-optimization/tags/1.5.9/speedup-optimization.php#L178"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/speedup-optimization/trunk/speedup-optimization.php#L172"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/speedup-optimization/trunk/speedup-optimization.php#L178"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/3f37c650-af0d-4474-9c1b-7f8d361b4d81?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Secondary"
    }
  ]
}