How severe is CVE-2026-27389?

CVE-2026-27389 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-27389 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-27389?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-27389 have an EU (EUVD) identifier?

Yes. CVE-2026-27389 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9641.

When was CVE-2026-27389 published?

CVE-2026-27389 was published on 2026-03-05 and last updated on 2026-06-17.

CVE-2026-27389

CVE-2026-27389 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-288.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9641
Weakness: CWE-288
Published: 2026-03-05
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-27389?: CVE-2026-27389 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-27389 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-27389?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-27389 have an EU (EUVD) identifier?: Yes. CVE-2026-27389 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9641.
When was CVE-2026-27389 published?: CVE-2026-27389 was published on 2026-03-05 and last updated on 2026-06-17.

References

https://patchstack.com/database/Wordpress/Plugin/wedesigntech-ultimate-booking-addon/vulnerability/wordpress-wedesigntech-ultimate-booking-addon-plugin-1-0-1-account-takeover-vulnerability-2?_s_id=cve

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