Booking Package <= 1.7.16 - Authenticated (Editor+) Privilege Escalation via Account Takeover to updateUser AJAX Action
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| masaakitanaka | Booking Package | up to 1.7.16 | — | No fix listed | CNA |
- Booking Package Vendormasaakitanaka Affected up to 1.7.16 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-9851
- 2026-10-03 Alias added: GHSA-9gp9-g392-77v9
References
Other 5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/795c1fd6-137b-4414-8d6b-30053bfb5924?source=cve
- https://plugins.trac.wordpress.org/browser/booking-package/tags/1.7.13/lib/Schedule.php#L868
- https://plugins.trac.wordpress.org/browser/booking-package/tags/1.7.13/index.php#L4477
- https://plugins.trac.wordpress.org/browser/booking-package/tags/1.7.13/index.php#L4416
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3558752%40booking-package&new=3558752%40booking-package&sfp_email=&sfph_mail=
More masaakitanaka vulnerabilities
- TI-2026-12907 Booking Package <= 1.7.20 - Unauthenticated SQL Injection via 'email' Form Parameter CVSS 3.1HIGH 7.5
- TI-2026-73813 Missing authorization in Booking Package exposes customer data CVSS 3.1HIGH 7.5
- TI-2026-04281 Booking Package <= 1.7.06 - Unauthenticated Price Manipulation via 'amount' Parameter CVSS 3.1MEDIUM 5.3
- TI-2026-73814 Stored cross-site scripting in Booking Package WordPress plugin CVSS 3.1MEDIUM 6.4
- TI-2024-12549 Booking Package <= 1.6.72 - Reflected Cross-Site Scripting via Locale Parameter CVSS 3.1MEDIUM 6.1
Sources
- CVE-2026-9851 · CVE Program
- CVE-2026-9851 · NVD
- FIRST EPSS
- GHSA-9gp9-g392-77v9 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences