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 0% (34th 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: 0% (34th 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 0% (34th 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

Other CWE-288 vulnerabilities

CVE-2026-53622 — Critical (CVSS 10.0): Traefik is an HTTP reverse proxy and load balancer. Prior to 3.7.3, there is a critical vulnerability in Traefik's…
CVE-2026-48491 — Critical (CVSS 10.0): Traefik is an HTTP reverse proxy and load balancer. From 3.7.0 until 3.7.3, there is a high severity vulnerability in…
CVE-2026-48020 — Critical (CVSS 10.0): Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.48, 3.6.19, and 3.7.3, there is a high severity…
CVE-2026-20079 — Critical (CVSS 10.0): A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an…
CVE-2024-10081 — Critical (CVSS 10.0): CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy.…
CVE-2024-2973 — Critical (CVSS 10.0): An Authentication Bypass Using an Alternate Path or Channel vulnerability in Juniper Networks Session Smart Router or…

Browse all CWE-288 vulnerabilities →