CVE-2026-1083 Cross-site scripting in Appointment Hour Booking – Booking Calendar
Administrators can inject scripts via form configuration fields in this WordPress plugin, affecting multi-site or restricted HTML environments.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1083?
CVE-2026-1083 is a medium-severity cross-site scripting vulnerability in codepeople Appointment Hour Booking – Booking Calendar, published on 28 Jan 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Appointment Hour Booking – Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via form field configuration parameters in all versions up to, and including, 1.5.60 due to insufficient input sanitization and output escaping on the 'Min length/characters' and 'Max length/characters' field configuration values. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the form builder interface. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Weakness: CWE-79
Which versions are affected by CVE-2026-1083?
How do I fix CVE-2026-1083?
No fix has been published for CVE-2026-1083 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-2026-1083 being exploited?
There is no known exploitation of CVE-2026-1083 in the wild and no public exploit code.
Sources
Also known as GHSA-pwc8-wvmv-h77r.