CVE-2026-15948 Hydra Booking <= 1.2.2 - Authenticated (Host+) Stored Cross-Site Scripting via 'first_name' Parameter
Authenticated attackers can inject scripts via the first_name parameter, potentially leading to code execution or account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15948?
CVE-2026-15948 is a medium-severity cross-site scripting vulnerability in themefic Hydra Booking — Appointment Scheduling & Booking Calendar, published on 15 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-15948?
How do I fix CVE-2026-15948?
No fix has been published for CVE-2026-15948 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-15948 being exploited?
There is no known exploitation of CVE-2026-15948 in the wild and no public exploit code.
Sources
Also known as GHSA-423j-8hf8-fp25.