Auth bypass in Hydra Booking — Appointment Scheduling & Calendar

CVE-2026-92421

The Hydra Booking — Appointment Scheduling & Booking Calendar WordPress plugin before 1.2.3 does not verify that the host record being modified belongs to the user making the request, allowing authenticated users holding a Hydra Booking — Appointment Scheduling & Booking Calendar WordPress plugin before 1.2.3-assigned host role to modify other hosts' profile data and reassign ownership of another host's record to themselves.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (21.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-92421: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Hydra Booking — Appointment Scheduling & Calendar

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-92421?
CVE-2026-92421 is a medium-severity vulnerability in Hydra Booking — Appointment Scheduling & Calendar, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.7/10. Published 2026-09-19.
How severe is CVE-2026-92421?
Medium severity. CVSS v3 base score is 4.7 out of 10.