WordPress Booking Plugin Privilege Escalation via IDOR Flaw

The LatePoint – Calendar Booking Plugin for Appointments and Events plugin for WordPress is vulnerable to Privilege Escalation to Administrator in versions up to, and including, 5.6.3 This is due to an Insecure Direct Object Reference (IDOR) in the create_or_update() function of OsOrdersController, which allows an authenticated Agent to supply an arbitrary order[customer_id] and overwrite any LatePoint customer's email field (including one linked to a WordPress Administrator's account) through the public-scope customer set_data() call, combined with a missing role verification in OsAuthHelper::authorize_customer() which logs in the linked WordPress user without checking its role. This makes it possible for authenticated attackers, with custom (Agent)-level access and above, to elevate their privileges to Administrator.

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 LatePoint Calendar Booking Plugin for WordPress versions up to 5.6.3 contains a critical Insecure Direct Object Reference (IDOR) vulnerability in the create_or_update() function that allows authenticated agents to escalate their privileges to administrator level. By manipulating the order[customer_id] parameter, an attacker can overwrite customer email fields, including those linked to WordPress administrator accounts, enabling complete account takeover and platform compromise. This affects any WordPress site running the vulnerable plugin with agent-level users, making it a significant risk for appointment-based businesses relying on this widely-used booking solution.

Casky.ai's 224 mapped security skills leverage Claude's extended reasoning to detect the privilege escalation patterns underlying TA0004 (Privilege Escalation) techniques. Practitioners using Casky would identify findings showing IDOR exploitation detection through parameter tampering analysis—specifically the suspicious modification of customer_id values by non-privileged users. The platform's skill correlation would highlight the chain: initial agent authentication → direct object reference manipulation → unauthorized customer record modification → email field overwrite targeting administrator accounts. Security teams would see detection signals for lateral movement and privilege escalation attempts, with Claude reasoning through the attack context to distinguish legitimate booking operations from malicious object reference abuse, enabling faster incident response and vulnerability remediation before attackers achieve administrative control.

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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-2026-13228.

abusing-dpapi-for-credential-access

red teaming · high

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abusing-shadow-credentials-for-privesc

red teaming · high

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analyzing-cloud-storage-access-patterns

cloud security · low

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MITRE ATT&CK Techniques

TA0004

Investigate the attack patterns behind CVE-2026-13228

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