CVE-2026-9851

Status: DeferredHigh (7.2)—

The Booking Package plugin for WordPress is vulnerable to Privilege Escalation via Account Takeover in versions up to, and including, 1.7.16. This is due to a missing capability check on the 'updateUser' branch of the package_app_action AJAX endpoint, where the handler only validates a nonce and the dispatcher invokes Schedule::updateUser() with the $administrator argument hard-coded to 1, bypassing the only owner-restriction check inside that function and allowing the target user to be determined solely by attacker-supplied input passed directly to wp_update_user().

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This makes it possible for authenticated attackers, with Editor-level access and above, to change the email address and password of any account, including Administrator accounts, resulting in a full site takeover.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Base score: 7.2

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.61%
Percentile among all scored CVEs: 47
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1210 Exploitation of Remote Serviceslateral movement85 %
Primary impactT1098.002 Additional Email Delegate Permissionspersistence · privilege escalation90 %
Secondary impactT1078.001 Default Accountsstealth · persistence · privilege escalation · initial access90 %
Secondary impactT1098.001 Additional Cloud Credentialspersistence · privilege escalation85 %

AJAX remoto (PR:H) sin validación de capability permite cambiar credenciales y email de cualquier cuenta (incluida Admin), logrando compromiso total del sitio mediante T1098 (modificación de cuentas) y acceso administrativo (T1078.001).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account Management Multi-factor Authentication Disable or Remove Feature or Program Network Segmentation Vulnerability Scanning User Account Management

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Saasproject — Booking Package^AI

CWEs

CWE-639

References

Raw JSON (NVD)

Show

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          "timestamp": "2026-06-06T11:33:35.308170Z"
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  "published": "2026-06-06T05:16:30.047",
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    {
      "url": "https://plugins.trac.wordpress.org/browser/booking-package/tags/1.7.13/index.php#L4416",
      "source": "security@wordfence.com"
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    {
      "url": "https://plugins.trac.wordpress.org/browser/booking-package/tags/1.7.13/index.php#L4477",
      "source": "security@wordfence.com"
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    {
      "url": "https://plugins.trac.wordpress.org/browser/booking-package/tags/1.7.13/lib/Schedule.php#L868",
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    {
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3558752%40booking-package&new=3558752%40booking-package&sfp_email=&sfph_mail=",
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      "lang": "en",
      "value": "The Booking Package plugin for WordPress is vulnerable to Privilege Escalation via Account Takeover in versions up to, and including, 1.7.16. This is due to a missing capability check on the 'updateUser' branch of the package_app_action AJAX endpoint, where the handler only validates a nonce and the dispatcher invokes Schedule::updateUser() with the $administrator argument hard-coded to 1, bypassing the only owner-restriction check inside that function and allowing the target user to be determined solely by attacker-supplied input passed directly to wp_update_user(). This makes it possible for authenticated attackers, with Editor-level access and above, to change the email address and password of any account, including Administrator accounts, resulting in a full site takeover."
    },
    {
      "lang": "es",
      "value": "El plugin Booking Package para WordPress es vulnerable a escalada de privilegios a través de toma de control de cuenta en versiones hasta la 1.7.16, inclusive. Esto se debe a una comprobación de capacidad faltante en la rama 'updateUser' del endpoint AJAX package_app_action, donde el gestor solo valida un nonce y el despachador invoca Schedule::updateUser() con el argumento $administrator codificado a 1, omitiendo la única comprobación de restricción de propietario dentro de esa función y permitiendo que el usuario objetivo sea determinado únicamente por la entrada proporcionada por el atacante pasada directamente a wp_update_user(). Esto hace posible que atacantes autenticados, con acceso de nivel Editor y superior, cambien la dirección de correo electrónico y la contraseña de cualquier cuenta, incluidas las cuentas de Administrador, lo que resulta en una toma de control completa del sitio."
    }
  ],
  "lastModified": "2026-07-23T07:10:00.113",
  "sourceIdentifier": "security@wordfence.com"
}