CVE-2026-15948

Hydra Booking <= 1.2.2 - Authenticated (Host+) Stored Cross-Site Scripting via 'first_name' Parameter

2026-08-14 15:06
Wordfence PRISM

Strategic Overview

Status
Patched in 1.2.3
Affected Plugin
Hydra Booking — Appointment Scheduling & Booking Calendar
Affected Version
<= 1.2.2
CVSS
6.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2026-15948
View all Hydra Booking — Appointment Scheduling & Booking Calendar vulnerabilities

At a glance

CVE-2026-15948 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Hydra Booking WordPress plugin, affecting versions <= 1.2.2. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Host level or above. The issue is fixed in version 1.2.3; sites on affected versions should update now. Disclosed August 2026, reported by Wordfence PRISM.

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Hydra Booking <= 1.2.2 carries this weakness at first_name, and reaching it takes an account at Host level or above. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Hydra Booking the fix is 1.2.3: builds <= 1.2.2 are affected, anything from 1.2.3 onward is not.

Remediation

Update to version 1.2.3, or a newer patched version

How does WordSec protect against this?

An attacker needs Host access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Hydra Booking 1.2.3 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-15948https://www.wordfence.com/threat-intel/vulnerabilities/id/8331fe3f-e943-4f4c-887f-761f3e18eb79https://nvd.nist.gov/vuln/detail/CVE-2026-15948

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C