Tutor LMS REST API Permission Enforcement Bypass

The Tutor LMS WordPress plugin before 4.0.8 does not correctly determine whether an incoming request is addressed to its own REST API, and does not enforce the permission recorded against an API credential, allowing the holder of a read-only key to act as the administrator account that issued it.

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

Tutor LMS WordPress plugin versions before 4.0.8 contain a critical permission validation flaw in their REST API implementation. The vulnerability allows attackers with read-only API credentials to escalate privileges and perform administrative actions by exploiting improper request validation logic. This affects WordPress sites running vulnerable Tutor LMS versions—a popular learning management system plugin used by educational institutions and training platforms. The flaw is particularly dangerous because it bypasses intended access controls that should restrict read-only API keys to their designated scope, enabling complete account takeover and unauthorized platform modification.

Casky's 224 mapped skills detect this vulnerability by analyzing API request handling patterns against MITRE ATT&CK TA0004 (Privilege Escalation) techniques. Security practitioners using Casky would observe findings related to insufficient API permission validation, credential misuse, and unauthorized administrative action execution. The extended reasoning capability identifies how attackers exploit the gap between credential validation and permission enforcement—specifically, where the plugin fails to cross-check API key permissions against requested operations. Practitioners would see attack pattern indicators including: anomalous REST API calls from read-only credentials requesting administrative endpoints, permission context mismatches in API logs, and privilege level discrepancies between issued credentials and performed actions. This multi-layered skill mapping helps teams understand not just that a vulnerability exists, but the complete exploitation chain and detection opportunities.

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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-2026-85569.

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-2026-85569

Casky has 224 skills that investigate the attack patterns behind CVE-2026-85569. Run one and get CVSS-scored findings in 3 minutes.

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