WordPress Eventin Plugin Inadequate Event Ownership Verification

The Eventin WordPress plugin before 4.1.21 does not properly verify ownership of events before allowing them to be modified, deleted, or reassigned to a different author, allowing users with contributor-level access and above to alter, delete, or take over events created by other users including administrators.

Casky was already ahead

This CVE exploits attack patterns that Casky's 283matched 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 Eventin WordPress plugin before version 4.1.21 contains an authorization bypass vulnerability where the application fails to properly validate event ownership before allowing modifications, deletions, or reassignments. This flaw allows any user with contributor-level access or higher to manipulate events created by other users—including administrators—without proper authorization checks. WordPress sites running the vulnerable plugin become targets for privilege escalation attacks, data destruction, and account takeover scenarios, particularly in multi-author environments where contributor accounts are commonly issued to external writers, guest authors, or agency partners.

Casky's 283 matching skills detect this vulnerability pattern by analyzing both the Privilege Escalation (TA0004) and Credential Access (TA0006) techniques through Claude's extended reasoning. Practitioners using Casky would identify findings showing insufficient access control checks on event modification endpoints, missing ownership validation in delete/reassign operations, and improper authorization logic that allows lateral privilege abuse. The platform maps these findings to CWE-639 (Authorization Bypass Through User-Controlled Key) and surfaces them alongside attack chain indicators—such as contributor accounts performing administrative actions, event ownership changes from unexpected sources, or batch deletions of high-value content—enabling security teams to detect exploitation attempts before widespread damage occurs.

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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 →

283 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-13169.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

cryptography · low

Run

MITRE ATT&CK Techniques

TA0004 TA0006

Investigate the attack patterns behind CVE-2026-13169

Casky has 283 skills that investigate the attack patterns behind CVE-2026-13169. Run one and get CVSS-scored findings in 3 minutes.

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