Amelia <= 2.1.3 - Insecure Direct Object Reference to Authenticated (Employee+) Privilege Escalation via 'externalId' Parameter

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Summary

CVECVE-2026-5465
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-07 07:16:24 UTC
Updated2026-04-07 13:20:11 UTC
DescriptionThe Booking for Appointments and Events Calendar – Amelia plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.1.3. This is due to the `UpdateProviderCommandHandler` failing to validate changes to the `externalId` field when a Provider (Employee) user updates their own profile. The `externalId` maps directly to a WordPress user ID and is passed to `wp_set_password()` and `wp_update_user()` without authorization checks. This makes it possible for authenticated attackers, with Provider-level (Employee) access and above, to take over any WordPress account — including Administrator — by injecting an arbitrary `externalId` value when updating their own provider profile.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

EPSS: 0.000500000 probability, percentile 0.153650000 (date 2026-04-07)

Problem Types: CWE-639 | CWE-639 CWE-639 Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Ameliabooking Booking For Appointments And Events Calendar Amelia affected 2.1.3 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/src/Application/Commands/Use... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/src/Application/Controller/U... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3499608/ameliabooking/trunk/src/Application/Command... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/src/Application/Commands/Use... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/a4204099-1065-4167-8b42-3da25... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/src/Application/Commands/Use... [email protected] plugins.trac.wordpress.org
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: Osvaldo Noe Gonzalez Del Rio (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-04-03T06:43:39.000ZVendor Notified
CNA2026-04-06T18:13:11.000ZDisclosed
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