WordPress Plugin Fails to Validate User Role Selection

The Choose User Role at Registration WordPress plugin before 1.3.3 does not validate the role requested at registration against the roles an administrator chose to offer, allowing unauthenticated users to request any role, including administrator, and to be granted it once the request is approved. Exploitation requires the Choose User Role at Registration WordPress plugin before 1.3.3's role selection feature and public account registration to both be enabled.

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 Choose User Role at Registration WordPress plugin before version 1.3.3 contains an improper access control vulnerability that allows unauthenticated users to request any role during registration, including administrator privileges. The plugin fails to validate requested roles against the administrator's configured allowlist, meaning attackers can bypass intended role restrictions entirely. This vulnerability affects WordPress sites using this plugin with both public registration and the role selection feature enabled, potentially giving attackers immediate admin-level access once their registration is approved. The impact is severe: an attacker gains unauthorized privilege escalation without requiring existing credentials or social engineering, directly compromising site integrity and data security.

Casky's 224 matched security skills leverage Claude AI's extended reasoning to detect the attack patterns associated with TA0004 (Privilege Escalation) techniques. Practitioners using Casky would identify suspicious activity patterns including: unauthenticated registration requests attempting to assign administrator roles, mismatches between requested roles and configured allowlists in plugin settings, and post-registration privilege escalations that occur without administrator action. The platform's mapping to CWE-269 (Improper Access Control / Privilege Management) enables detection of authorization bypass attempts at the role validation layer. Security teams would see findings highlighting role selection abuse, unvalidated trust in user-supplied role parameters, and the critical gap between configured and actual role permissions—allowing them to prioritize patching or disabling this plugin before exploitation 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 →

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-2026-85128.

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-2026-85128

Casky has 224 skills that investigate the attack patterns behind CVE-2026-85128. Run one and get CVSS-scored findings in 3 minutes.

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