CVE-2026-111727 The Appointment Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'vs_text_submitbtn' parameter in
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-111727?
CVE-2026-111727 is a medium-severity vulnerability in codepeople Appointment Booking Calendar, published on 28 Oct 2026.
Official description
The Appointment Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'vs_text_submitbtn' parameter in all versions up to, and including, 1.4.05 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the attacker to be assigned as a calendar owner, a per-user grant that any administrator can extend to users as low as Subscriber level through the plugin's calendar list screen. Exploitation by attackers with subscriber-level access and above requires that an administrator has assigned the attacker's account as owner (`conwer`) of a calendar via the plugin's calendar list screen; the plugin's UI lists all registered users regardless of role, so a Subscriber can be assigned. On a default installation, where that is not configured, the vulnerability requires attackers with editor-level access and above.
Weakness: CWE-79
Which versions are affected by CVE-2026-111727?
How do I fix CVE-2026-111727?
No fix has been published for CVE-2026-111727 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-111727 being exploited?
There is no known exploitation of CVE-2026-111727 in the wild and no public exploit code.
Sources
Also known as GHSA-fpgw-376p-gw9c.