DOM-Based XSS in Easy Appointments Scheduling Platform

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Easy Appointments allows DOM-Based XSS. This issue affects Easy Appointments: from n/a through 4.0.2.1.

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

Easy Appointments versions through 4.0.2.1 contain a DOM-based Cross-Site Scripting (XSS) vulnerability that allows attackers to inject malicious scripts directly into the Document Object Model without server-side processing. This vulnerability matters because appointment scheduling systems often handle sensitive customer data and are frequently internet-facing, making them attractive targets for credential theft, session hijacking, and malware distribution. Organizations using Easy Appointments for customer booking, healthcare scheduling, or service reservations are at risk, particularly when the platform processes user-supplied input in URLs or form fields that get reflected in the DOM.

Casky's 323 mapped skills leverage Claude AI's extended reasoning to identify the attack patterns behind DOM-based XSS by analyzing how user input flows through client-side JavaScript execution contexts. Practitioners using Casky would detect this vulnerability through skills aligned with MITRE ATT&CK's Initial Access (TA0001) and Reconnaissance (TA0043) techniques—specifically identifying payload injection points where unsanitized input reaches DOM manipulation functions like innerHTML, eval(), or JavaScript event handlers. The platform's security skills would flag suspicious patterns such as unencoded user-controlled data in script tags, dynamic DOM updates without Content Security Policy enforcement, and input validation bypasses. Practitioners would see detailed findings showing exact code locations vulnerable to XSS, recommended input sanitization strategies, and detection signatures for common exploitation attempts targeting this CVE.

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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-2026-81798.

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-2026-81798

Casky has 323 skills that investigate the attack patterns behind CVE-2026-81798. Run one and get CVSS-scored findings in 3 minutes.

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