WordPress Plugin Allows Subscriber Privilege Escalation to Admin

The WP BASE Booking of Appointments, Services and Events WordPress plugin before 6.5.1 does not properly restrict access to one of its user-creation actions, allowing authenticated users with Subscriber-level access and above to create a new administrator account and thereby escalate their privileges.

Casky was already ahead

This CVE exploits attack patterns that Casky's 224matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

The WP BASE Booking plugin before version 6.5.1 contains an access control vulnerability that allows authenticated users with minimal Subscriber-level permissions to create new administrator accounts. This represents a critical privilege escalation flaw affecting any WordPress installation using the vulnerable plugin version. Organizations relying on WordPress role-based access controls to maintain security boundaries are at risk, as attackers with basic user accounts can bypass intended permission restrictions and gain full administrative control over the entire WordPress instance and its data.

Casky's 224 matched security skills leverage Claude AI to detect the privilege escalation patterns mapped to MITRE ATT&CK technique TA0004 (Privilege Escalation). Practitioners using Casky would identify detection signals including: unauthorized admin account creation events, authentication logs showing Subscriber-level users triggering administrative functions, suspicious user-creation API calls from low-privilege contexts, and role-modification activities that deviate from expected administrative workflows. The extended reasoning capability maps these behavioral indicators against known exploitation patterns, flagging the specific user-creation action parameters that bypass access controls, enabling security teams to spot both active exploitation attempts and post-compromise artifacts indicating admin account creation by compromised subscriber accounts.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

224 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-123064.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

identity access management · low

Run

MITRE ATT&CK Techniques

TA0004

Investigate the attack patterns behind CVE-2026-123064

Casky has 224 skills that investigate the attack patterns behind CVE-2026-123064. Run one and get CVSS-scored findings in 3 minutes.

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