Booking for Appointments and Events Calendar – Amelia (Premium) 8.0 - 9.6.2 - Unauthenticated Privilege Escalation to Administrator via 'externalId'

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-9055
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-02 05:17:10 UTC
Updated2026-09-02 13:55:27 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.002910000 probability, percentile 0.213070000 (date 2026-09-05)

Problem Types: CWE-269 | CWE-269 CWE-269 Improper Privilege Management

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Melograno Booking For Appointments And Events Calendar Amelia affected 8.0 9.6.2 semver Not specified

References

ReferenceSourceLinkTags
wpamelia.com/documentation/changelog [email protected] wpamelia.com
www.wordfence.com/threat-intel/vulnerabilities/id/0c2266b8-cc23-46de-bc80-09e3d... [email protected] www.wordfence.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: d.v4n_s3c (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-20T01:27:43.000ZVendor Notified
CNA2026-09-01T00:00:00.000ZDisclosed

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