What is CVE-2026-12378?

CVE-2026-12378 is a high-severity vulnerability in Appointment Booking Calendar Plugin And Scheduling, classified under CWE-502 DESERIALIZATION OF UNTRUSTED DATA. CVSS score: 8.1/10. Published 2026-07-08.

How severe is CVE-2026-12378?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Appointment Booking Calendar Plugin And Scheduling

CVE-2026-12378

The Appointment Booking Calendar Plugin and Scheduling Plugin WordPress plugin through 1.1.28 does not validate data before passing it to a PHP deserialization function, allowing unauthenticated attackers to inject arbitrary PHP objects…

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Unknown Appointment Booking Calendar Plugin And Scheduling — versions 0

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-12378?: CVE-2026-12378 is a high-severity vulnerability in Appointment Booking Calendar Plugin And Scheduling, classified under CWE-502 DESERIALIZATION OF UNTRUSTED DATA. CVSS score: 8.1/10. Published 2026-07-08.
How severe is CVE-2026-12378?: High severity. CVSS v3 base score is 8.1 out of 10.