CVE-2026-109369 (GCVE-0-2026-109369)

Vulnerability from cvelistv5 – Published: 2026-10-17 03:43 – Updated: 2026-10-17 03:43
VLAI
Title
WP Booking System <= 2.1.0.3 - Missing Authorization to Authenticated (Subscriber+) Privilege Escalation via 'user_permission' Parameter via Cross-Form Nonce Reuse
Summary
The WP Booking System – Booking Calendar plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.1.0.3 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to grant themselves and arbitrary other users edit access to every booking form on the site by overwriting the user_permission meta that governs the plugin's own access-control list. Exploitation requires the attacker to have already been delegated edit rights on at least one booking form, as this delegation both downgrades the submenu capability to 'read' (making the edit page accessible) and allows them to harvest a valid wpbs_edit_form nonce that will pass validation against any other form_id.
Severity
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2313 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
murgroland WP Booking System – Booking Calendar Affected: 0 , ≤ 2.1.0.3 (semver)
guessed Create a notification for this product.
Credits
Wordfence PRISM
Show details on NVD website
To clipboard 

{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "WP Booking System \u2013 Booking Calendar",
          "vendor": "murgroland",
          "versions": [
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
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          "type": "finder",
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          "value": "The WP Booking System \u2013 Booking Calendar plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.1.0.3 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to grant themselves and arbitrary other users edit access to every booking form on the site by overwriting the user_permission meta that governs the plugin\u0027s own access-control list. Exploitation requires the attacker to have already been delegated edit rights on at least one booking form, as this delegation both downgrades the submenu capability to \u0027read\u0027 (making the edit page accessible) and allows them to harvest a valid wpbs_edit_form nonce that will pass validation against any other form_id."
        }
      ],
      "metrics": [
        {
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            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
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              "description": "CWE-862 Missing Authorization",
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            }
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      "providerMetadata": {
        "dateUpdated": "2026-10-17T03:43:28.717Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
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        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.2/includes/modules/user-restrictions/functions-restrictions-form.php#L56"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.2/includes/base/admin/form/functions-actions-form.php#L97"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.2/includes/base/admin/functions.php#L30"
        },
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          "url": "https://plugins.trac.wordpress.org/changeset?old=3730163\u0026old_path=%2Fwp-booking-system%2Ftrunk\u0026new=\u0026new_path=%2Fwp-booking-system%2Ftrunk"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/3750120/wp-booking-system/trunk/includes/modules/user-restrictions/functions-restrictions-form.php"
        }
      ],
      "timeline": [
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          "lang": "en",
          "time": "2026-10-12T14:37:52.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-10-16T14:39:08.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "WP Booking System \u003c= 2.1.0.3 - Missing Authorization to Authenticated (Subscriber+) Privilege Escalation via \u0027user_permission\u0027 Parameter via Cross-Form Nonce Reuse"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-109369",
    "datePublished": "2026-10-17T03:43:28.717Z",
    "dateReserved": "2026-10-12T14:22:17.159Z",
    "dateUpdated": "2026-10-17T03:43:28.717Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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                "vendor": "murgroland",
                "versions": [
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                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  }
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            ],
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        "cveTags": [],
        "descriptions": [
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            "value": "The WP Booking System \u2013 Booking Calendar plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.1.0.3 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to grant themselves and arbitrary other users edit access to every booking form on the site by overwriting the user_permission meta that governs the plugin\u0027s own access-control list. Exploitation requires the attacker to have already been delegated edit rights on at least one booking form, as this delegation both downgrades the submenu capability to \u0027read\u0027 (making the edit page accessible) and allows them to harvest a valid wpbs_edit_form nonce that will pass validation against any other form_id."
          }
        ],
        "id": "CVE-2026-109369",
        "lastModified": "2026-10-17T04:16:51.620",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.8,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
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              "type": "Primary"
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        "published": "2026-10-17T04:16:51.620",
        "references": [
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          },
          {
            "source": "security@wordfence.com",
            "url": "https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.2/includes/base/admin/functions.php#L30"
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          {
            "source": "security@wordfence.com",
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          },
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            "source": "security@wordfence.com",
            "url": "https://plugins.trac.wordpress.org/changeset?old=3730163\u0026old_path=%2Fwp-booking-system%2Ftrunk\u0026new=\u0026new_path=%2Fwp-booking-system%2Ftrunk"
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            "source": "security@wordfence.com",
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        "sourceIdentifier": "security@wordfence.com",
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            "source": "security@wordfence.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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