FKIE_CVE-2026-18315

Vulnerability from fkie_nvd - Published: 2026-08-19 19:17 - Updated: 2026-08-20 12:48
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
The TrueBooker – Appointment Booking and Scheduler System plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key leading to Account Takeover in all versions up to, and including, 1.2.6. This is due to the admin_user_create_cus AJAX handler lacking any authentication or capability check before passing the attacker-supplied truebooker_wp_user_id parameter directly to wp_update_user. This makes it possible for unauthenticated attackers to overwrite the email address of any WordPress user — including an administrator — and then complete the standard WordPress lost-password flow to fully take over the targeted account.
References
security@wordfence.comhttps://plugins.svn.wordpress.org/truebooker-appointment-booking/tags/1.2.6/main/config/truebooker-style.php
security@wordfence.comhttps://plugins.svn.wordpress.org/truebooker-appointment-booking/tags/1.2.6/main/function_ajax.php
security@wordfence.comhttps://plugins.svn.wordpress.org/truebooker-appointment-booking/tags/1.2.6/templates/login-register.php
security@wordfence.comhttps://plugins.trac.wordpress.org/changeset/3640018/truebooker-appointment-booking
security@wordfence.comhttps://www.wordfence.com/threat-intel/vulnerabilities/id/73251a74-5be3-446b-8e0a-ff2d1484c467?source=cve
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "TrueBooker \u2013 Appointment Booking and Scheduler System",
          "vendor": "themetechmount",
          "versions": [
            {
              "lessThanOrEqual": "1.2.6",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The TrueBooker \u2013 Appointment Booking and Scheduler System plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key leading to Account Takeover in all versions up to, and including, 1.2.6. This is due to the admin_user_create_cus AJAX handler lacking any authentication or capability check before passing the attacker-supplied truebooker_wp_user_id parameter directly to wp_update_user. This makes it possible for unauthenticated attackers to overwrite the email address of any WordPress user \u2014 including an administrator \u2014 and then complete the standard WordPress lost-password flow to fully take over the targeted account."
    }
  ],
  "id": "CVE-2026-18315",
  "lastModified": "2026-08-20T12:48:10.287",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "security@wordfence.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-08-19T19:17:11.980",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.svn.wordpress.org/truebooker-appointment-booking/tags/1.2.6/main/config/truebooker-style.php"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.svn.wordpress.org/truebooker-appointment-booking/tags/1.2.6/main/function_ajax.php"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.svn.wordpress.org/truebooker-appointment-booking/tags/1.2.6/templates/login-register.php"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/changeset/3640018/truebooker-appointment-booking"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/73251a74-5be3-446b-8e0a-ff2d1484c467?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Primary"
    }
  ]
}



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