FKIE_CVE-2026-17553

Vulnerability from fkie_nvd - Published: 2026-09-09 04:17 - Updated: 2026-09-09 15:33
Severity
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Summary
The WP EasyCart plugin for WordPress is vulnerable to privilege escalation in versions up to, and including, 5.9.3. This is due to the ec_ajax_save_page_default_options() AJAX handler iterating over every $_POST key and passing it directly into update_option() without any allowlist, while gating the handler only on 'manage_options' OR the plugin's custom 'wpec_manager' capability. The plugin's built-in 'wpec_store_manager' role holds 'wpec_manager' but not 'manage_options', and the required nonce is emitted on frontend product/category templates that render for any user with 'wpec_manager'. This makes it possible for authenticated attackers, with Store Manager-level access and above, to elevate their privileges to administrator by updating arbitrary WordPress options such as default_role='administrator' and users_can_register='1', then self-registering a new account that is assigned the administrator role.
References
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/admin/inc/wp_easycart_admin.php#L209
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/design/layout/base-responsive-v3/ec_product_page.php#L415
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7103
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7107
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7110
security@wordfence.comhttps://plugins.trac.wordpress.org/changeset?reponame=&old=3681924%40wp-easycart&new=3681924%40wp-easycart
security@wordfence.comhttps://www.wordfence.com/threat-intel/vulnerabilities/id/08e62276-f004-48ca-bb00-2f81e6ac4892?source=cve
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Shopping Cart \u0026 eCommerce Store",
          "vendor": "levelfourstorefront",
          "versions": [
            {
              "lessThanOrEqual": "5.9.3",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The WP EasyCart plugin for WordPress is vulnerable to privilege escalation in versions up to, and including, 5.9.3. This is due to the ec_ajax_save_page_default_options() AJAX handler iterating over every $_POST key and passing it directly into update_option() without any allowlist, while gating the handler only on \u0027manage_options\u0027 OR the plugin\u0027s custom \u0027wpec_manager\u0027 capability. The plugin\u0027s built-in \u0027wpec_store_manager\u0027 role holds \u0027wpec_manager\u0027 but not \u0027manage_options\u0027, and the required nonce is emitted on frontend product/category templates that render for any user with \u0027wpec_manager\u0027. This makes it possible for authenticated attackers, with Store Manager-level access and above, to elevate their privileges to administrator by updating arbitrary WordPress options such as default_role=\u0027administrator\u0027 and users_can_register=\u00271\u0027, then self-registering a new account that is assigned the administrator role."
    }
  ],
  "id": "CVE-2026-17553",
  "lastModified": "2026-09-09T15:33:34.467",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 5.9,
        "source": "security@wordfence.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-17553",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-09T13:13:11.443033Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-09T04:17:56.607",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/admin/inc/wp_easycart_admin.php#L209"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/design/layout/base-responsive-v3/ec_product_page.php#L415"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7103"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7107"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7110"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3681924%40wp-easycart\u0026new=3681924%40wp-easycart"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/08e62276-f004-48ca-bb00-2f81e6ac4892?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-269"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Secondary"
    }
  ]
}



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