WordPress EventON Plugin Authorization Bypass Escalation

The EventON Action User plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.5.14. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to grant EventON management capabilities and the upload_files capability to any non-administrator WordPress role or user, escalating their privileges within the site. The administrator role is protected by an early-return guard in update_role_caps(), so only non-administrator roles and individual users can be targeted; however, the same unauthenticated exposure also allows attackers to enumerate all WordPress users with their IDs and display names, disclose role and user capability state along with nonce values, and tamper with event-to-user term assignments.

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 EventON Action User plugin for WordPress contains a critical authorization bypass vulnerability that allows unauthenticated attackers to escalate privileges without proper permission validation. Affecting all versions up to 2.5.14, this flaw enables threat actors to grant EventON management capabilities and file upload permissions to any non-administrator user account, effectively transforming low-privilege accounts into high-privilege ones. Organizations running vulnerable versions of this popular event management plugin face immediate risk of account compromise, lateral movement, and potential site-wide takeover, as attackers can leverage elevated permissions to inject malicious code, modify content, or establish persistent access.

Casky's 283 matched security skills leverage Claude's extended reasoning to correlate this vulnerability with MITRE ATT&CK techniques TA0004 (Privilege Escalation) and TA0006 (Credential Access). Practitioners using Casky would observe detection patterns revealing unauthorized capability grants without corresponding authentication events, missing authorization checks in plugin function calls, and suspicious role elevation attempts from unauthenticated sources. The platform's skill-mapped analysis would specifically flag the absence of nonce verification and permission checks before capability assignment, enabling security teams to identify exploitation attempts, audit compromised accounts for unauthorized privilege grants, and quickly remediate affected installations before attackers establish operational 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 →

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-2026-10033.

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 TA0006

Investigate the attack patterns behind CVE-2026-10033

Casky has 283 skills that investigate the attack patterns behind CVE-2026-10033. Run one and get CVSS-scored findings in 3 minutes.

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