CVE-2026-9055: critical vulnerability in melograno Booking for Appointments and Events…
Booking for Appointments and Events Calendar – Amelia (Premium) 8.0 - 9.6.2 - Unauthenticated Privilege Escalation to Administrator via 'externalId'
Published
70Vexday Risk Score
Prioritize patching. It exploitation observed by VulnCheck and has a public proof of concept.
ssvc Actcvss 9.8epss 0.5%
from disclosure to weapon0 days
Published on NVDSep 2
1st PoCSep 2
VulnCheckSep 1
exploitation probability
0.5%top 57% of all CVEs
observed exploitation
yesVulnCheck
1 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
melograno · Booking for Appointments and Events Calendar – Ameliapublic PoCs found — 1
githubgithub.com/EXEcution-py/CVE-2026-9055★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — melograno Booking for Appointments and Events…
In the same product, most dangerous first.
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