CVE-2026-15948
Received Received - Intake

Stored XSS in Hydra Booking WordPress Plugin

Publication date: 2026-08-15

Last updated on: 2026-08-15

Assigner: Wordfence

Description
The Hydra Booking — Appointment Scheduling & Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'first_name' parameter in all versions up to, and including, 1.2.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with host-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The tfhb_host role required to exploit this vulnerability can be self-assigned by any visitor via the plugin's public Signup shortcode, making this effectively exploitable by unauthenticated users who complete the registration flow.

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Meta Information

Published
2026-08-15
Last Modified
2026-08-15
Generated
2026-08-15
AI Q&A
2026-08-15
EPSS Evaluated
N/A
NVD
CVE-2026-15948
EUVD
EUVD-2026-58861

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
hydra_booking appointment_scheduling_and_booking_calendar to 1.2.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the Hydra Booking WordPress plugin. It allows attackers to inject malicious scripts via the 'first_name' parameter due to poor input sanitization and output escaping. The vulnerability can be exploited by unauthenticated users who register through the plugin's Signup shortcode, as the required 'tfhb_host' role can be self-assigned during registration.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using the Hydra Booking plugin version 1.2.2 or lower. Check for unauthorized user registrations via the Signup shortcode and review stored input in the 'first_name' parameter for suspicious scripts.

Impact Analysis

An attacker could inject malicious scripts into pages that execute when users visit them. This could lead to theft of cookies, session tokens, or other sensitive data. It may also allow attackers to perform actions on behalf of users, modify page content, or redirect users to malicious sites.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection principles and HIPAA's security requirements. It may result in data breaches, unauthorized data processing, or loss of user trust, potentially leading to legal penalties and compliance failures.

Mitigation Strategies

Immediately update the Hydra Booking plugin to the latest version. Remove any unauthorized user accounts with the tfhb_host role. Implement strict input validation for user registration fields and monitor for unusual activity.

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