WP Booking System Reflected XSS in Admin Pages

The WP Booking System WordPress plugin before 2.1.0.3 does not validate and escape one of its parameters before reflecting it back in an admin page, leading to Reflected Cross-Site Scripting which could be used against high privilege users such as administrators.

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 WP Booking System WordPress plugin versions before 2.1.0.3 contain a Reflected Cross-Site Scripting (XSS) vulnerability stemming from insufficient input validation and output encoding. An unauthenticated attacker can craft a malicious URL containing unvalidated parameters that, when clicked by a high-privilege administrator, executes arbitrary JavaScript in the context of that admin's session. This is particularly dangerous because administrators have unrestricted access to WordPress configuration, user data, and plugin settings—making them high-value targets. Any WordPress site running the vulnerable plugin version is at risk, with the attack surface extending to all users with admin access who might be socially engineered into clicking malicious links.

Casky's 323 mapped security skills leverage Claude AI's extended reasoning to detect the attack patterns associated with this vulnerability across MITRE ATT&CK Initial Access (TA0001) and Persistence (TA0043) techniques. Practitioners using Casky would identify detection signatures for parameter injection attempts in admin pages, unescaped output reflection in HTTP responses, and behavioral patterns consistent with credential compromise or session hijacking following XSS exploitation. The platform's skills correlate CWE-79 patterns—specifically missing input sanitization and output encoding failures—with observable indicators such as suspicious script execution in admin contexts, abnormal privilege escalation sequences, and malicious payload delivery through referrer headers or query parameters. This multi-layered detection approach helps security teams move beyond signature-based defenses to understand the adversarial intent behind exploitation attempts.

Live Threat IntelligenceComing soon

Casky Risk Score

—

EPSS Probability

—

Shodan Exposure

—

GreyNoise Signal

—

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-2026-109147.

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-2026-109147

Casky has 323 skills that investigate the attack patterns behind CVE-2026-109147. Run one and get CVSS-scored findings in 3 minutes.

Run the skill that detects this →

X Instagram LinkedIn