ProSolution WP Client Reflected XSS in HTML Attributes

The ProSolution WP Client WordPress plugin before 2.0.11 does not sanitise and escape several parameters before reflecting them into HTML attributes on its public pages, leading to reflected Cross-Site Scripting that can be triggered against any visitor, including a logged-in administrator.

Casky was already ahead

This CVE exploits attack patterns that Casky's 322matched 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 ProSolution WP Client WordPress plugin before version 2.0.11 contains a reflected Cross-Site Scripting (XSS) vulnerability stemming from improper input sanitization and output encoding. Multiple parameters are reflected directly into HTML attributes without adequate escaping, allowing attackers to inject malicious JavaScript code. This vulnerability is particularly severe because it can target any visitor to an affected site, including authenticated administrators with elevated privileges. Organizations running vulnerable versions of this plugin face risks including credential theft, malware distribution, and unauthorized administrative actions, making this a critical concern for WordPress administrators managing client-facing websites.

Casky's 322 matched security skills leverage Claude AI's extended reasoning to detect the attack patterns mapped to TA0001 (Initial Access) and TA0043 (Reconnaissance). Practitioners using Casky would see findings that correlate suspicious parameter reflection patterns with XSS payloads in HTTP requests—such as unescaped user input appearing in HTML attributes like onclick, onload, or data-* attributes. The platform identifies the absence of proper output encoding mechanisms that should convert dangerous characters (quotes, angle brackets, ampersands) into HTML entities. Through behavioral analysis, Casky detects the reconnaissance phase where attackers probe for vulnerable parameters, followed by initial access attempts using crafted payloads. Practitioners receive actionable intelligence showing which parameters lack sanitization, the specific encoding functions needed, and how to validate that updates to version 2.0.11 or later have remediated the vulnerability.

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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 →

322 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-19055.

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

Investigate the attack patterns behind CVE-2026-19055

Casky has 322 skills that investigate the attack patterns behind CVE-2026-19055. Run one and get CVSS-scored findings in 3 minutes.

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