What is CVE-2026-15948?

CVE-2026-15948 is a medium-severity vulnerability in Themefic Hydra Booking — Appointment Scheduling & Calendar, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-08-15.

How severe is CVE-2026-15948?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Themefic Hydra Booking — Appointment Scheduling & Calendar

CVE-2026-15948

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.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Themefic Hydra Booking — Appointment Scheduling & Calendar — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-15948?: CVE-2026-15948 is a medium-severity vulnerability in Themefic Hydra Booking — Appointment Scheduling & Calendar, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-08-15.
How severe is CVE-2026-15948?: Medium severity. CVSS v3 base score is 6.4 out of 10.