CVE-2026-18496 (GCVE-0-2026-18496)

Vulnerability from cvelistv5 – Published: 2026-10-10 05:30 – Updated: 2026-10-10 05:30
VLAI
Title
Booking Calendar <= 11.4.3 - Unauthenticated Sensitive Information Exposure in 'WPBC_FLEXTIMELINE_NAV' AJAX Action
Summary
The Booking Calendar plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 11.4.3 via the wpbc_is_show_popover_in_flex_timeline() function. This makes it possible for unauthenticated attackers to extract sensitive data including names, email addresses, and phone numbers of customers who have made bookings.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2215 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
wpdevelop Booking Calendar Affected: 0 , ≤ 11.4.3 (semver)
guessed Create a notification for this product.
Credits
Jonah Burgess (CryptoCat)
Show details on NVD website
To clipboard 

{
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          "vendor": "wpdevelop",
          "versions": [
            {
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
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          "lang": "en",
          "type": "finder",
          "value": "Jonah Burgess (CryptoCat)"
        }
      ],
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        }
      ],
      "metrics": [
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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              "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor",
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              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-10T05:30:55.792Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/1ebfb030-c9b7-477a-8fe3-78e97da6bea9?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/3633943/booking"
        }
      ],
      "timeline": [
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          "time": "2026-05-22T00:00:00.000Z",
          "value": "Discovered"
        },
        {
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          "time": "2026-07-31T16:04:39.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-10-09T17:02:51.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Booking Calendar \u003c= 11.4.3 - Unauthenticated Sensitive Information Exposure in \u0027WPBC_FLEXTIMELINE_NAV\u0027 AJAX Action"
    }
  },
  "cveMetadata": {
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    "datePublished": "2026-10-10T05:30:55.792Z",
    "dateReserved": "2026-07-31T15:48:48.687Z",
    "dateUpdated": "2026-10-10T05:30:55.792Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "percentile": "0.10835"
    },
    "nvd": {
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                "vendor": "wpdevelop",
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          }
        ],
        "id": "CVE-2026-18496",
        "lastModified": "2026-10-10T06:16:42.543",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
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                "userInteraction": "NONE",
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        "sourceIdentifier": "security@wordfence.com",
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              }
            ],
            "source": "security@wordfence.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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