What is CVE-2026-27389?

CVE-2026-27389 is a critical-severity vulnerability in Designthemes Wedesigntech Ultimate Booking Addon, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.8/10. Published 2026-03-05.

How severe is CVE-2026-27389?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Designthemes Wedesigntech Ultimate Booking Addon

CVE-2026-27389

Authentication Bypass Using an Alternate Path or Channel vulnerability in designthemes WeDesignTech Ultimate Booking Addon wedesigntech-ultimate-booking-addon allows Authentication Abuse.This issue affects WeDesignTech Ultimate Booking Addon: from n/a through <= 1.0.1.

EPSS: 0.004 (34.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Designthemes Wedesigntech Ultimate Booking Addon — versions 0

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-27389?: CVE-2026-27389 is a critical-severity vulnerability in Designthemes Wedesigntech Ultimate Booking Addon, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.8/10. Published 2026-03-05.
How severe is CVE-2026-27389?: Critical severity. CVSS v3 base score is 9.8 out of 10.