WordPress User Profile Builder XSS in Admin Pages

The User Profile Builder WordPress plugin before 4.0.1 does not escape the current page URL before outputting it in a JavaScript context on one of its admin pages, leading to Reflected Cross-Site Scripting against high-privilege users.

Casky was already ahead

This CVE exploits attack patterns that Casky's 323matched 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 User Profile Builder WordPress plugin before version 4.0.1 contains a Reflected Cross-Site Scripting (XSS) vulnerability in its admin pages, specifically through improper handling of the current page URL in JavaScript contexts. This vulnerability bypasses output encoding, allowing attackers to inject malicious scripts that execute in the browsers of high-privilege WordPress administrators. While not yet actively exploited in the wild according to CISA, the vulnerability poses a significant risk because it targets authenticated admin users who typically have broad permissions to modify site configuration, user data, and content. Any WordPress installation using this plugin version is potentially exposed, making this a critical patch priority for site administrators.

Casky.ai's 323 matched security skills leverage Claude's extended reasoning to identify attack patterns across MITRE ATT&CK techniques TA0001 (Initial Access) and TA0043 (Reconnaissance). Practitioners using the platform would observe detection patterns focused on CWE-79 validation failures, identifying how attackers probe for unescaped URL parameters in admin contexts and craft reflected payloads. The skills map to reconnaissance activities where threat actors enumerate plugin versions and admin page structures, then execution chains where XSS payloads trigger in privileged user sessions. Practitioners would see findings highlighting unsafe JavaScript concatenation of user-controlled input, missing output encoding functions (like wp_kses_js_encode or json_encode), and attack vectors showing how page URL parameters become executable code when reflected without sanitization.

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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 →

323 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-111948.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

Run

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

MITRE ATT&CK Techniques

TA0001 TA0043

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