Booking for Appointments and Events Calendar – Amelia (Premium) 8.0 — 9.6.2 - Unauthenticated Privilege Escalation to Administrator via 'externalId'
CVE-2026-9055Published · Updated Action summary
Affected: 8.0 – 9.6.2Update to 9.6.3 or newer
All remediation steps- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-269 Privilege Escalation
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Booking for Appointments and Events Calendar – Amelia ameliabooking
- Affected8.0 – 9.6.2
- Patched in9.6.3
Update to 9.6.3 or newer.
You are affected if you run 8.0 – 9.6.2. Version 9.6.3 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Booking for Appointments and Events Calendar – Amelia.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 9.6.3, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Booking for Appointments and Events Calendar – Amelia to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to d.v4n_s3c.
The Booking for Appointments and Events Calendar – Amelia (Premium) plugin for WordPress is vulnerable to Privilege Escalation in versions 8.0 - 9.6.2. This is due to insufficient validation of the attacker-controlled 'type' parameter in the customer update endpoint, which allows customers to set their role to 'manager' and trigger creation of a WordPress user with the wpamelia-manager role when the 'externalId' parameter is set to 0. This makes it possible for unauthenticated attackers to escalate their privileges to administrator by first elevating to the manager role, then creating a provider entity linked to an administrator user ID and overwriting that administrator's password.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Booking for Appointments and Events Calendar – Amelia
All 57| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.5 | Missing Authorization to Unauthenticated Arbitrary Event Attendee Data Exposure via '/report/event/attendees' Endpoint 9.0 – 9.9.1Update to 9.9.2 | CVE-2026-107616 | |
| Medium6.5 | Missing Authorization to Authenticated (Custom+) Sensitive Information Disclosure via '/report/event/bookings' Endpoint 9.0 – 9.9.1Update to 9.9.2 | CVE-2026-104992 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'page' Parameter ≤2.4.12Update to 2.4.13 | CVE-2026-103915 | |
| Medium5.3 | Missing Authorization ≤2.4.10Update to 2.4.11 | CVE-2026-116388 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤2.4.12Update to 2.4.13 | CVE-2026-116396 |
- High7.5Missing Authorization to Unauthenticated Arbitrary Event Attendee Data Exposure via '/report/event/attendees' Endpoint
9.0 – 9.9.1Update to 9.9.2
- Medium6.5Missing Authorization to Authenticated (Custom+) Sensitive Information Disclosure via '/report/event/bookings' Endpoint
9.0 – 9.9.1Update to 9.9.2
- Medium5.3Unauthenticated Sensitive Information Exposure in 'page' Parameter
≤2.4.12Update to 2.4.13
- Medium5.3Missing Authorization
≤2.4.10Update to 2.4.11
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤2.4.12Update to 2.4.13
Same weakness (Privilege Escalation)
All Privilege Escalation| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
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- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
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ELEX WordPress HelpDesk & Customer Ticketing System
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Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.