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; where a suitable gadget chain is present on the site this can be leveraged to achieve remote code execution.

CVSS v3.1

8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.65% chance of exploitation in the next 30 days, 48th percentile

Published

2026-07-08

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/eb3abb88-43c3-42a8-a8a8-2ad67d37e020/

References

• CVE Record
• NVD entry

Related

• CVE-2026-12376
• CVE-2026-12393
• CVE-2026-12375
• CVE-2026-12394
• CVE-2026-12352
• CVE-2026-12395