CVE-2026-12378

highCVSS 8.1covered by 1 sourcefirst seen 2026-07-08

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.

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Exploitation outlook

Low exploitation risk0.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-12378: The Appointment Booking Calendar Plugin and Scheduling Plugin WordPress plugin through 1.1.28 …nvd · 2026-07-08

External references

NVD record for CVE-2026-12378

CVE.org record

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