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CVE-2026-62101 – Authentication Bypass / Unauthenticated Admin Access – EduAdmin Booking (WordPress)

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Summary

CVE-2026-62101 is a critical authentication bypass vulnerability in the EduAdmin Booking WordPress plugin, developed by Chris Åkerfeldt Wendel. The flaw allows unauthenticated attackers to bypass the plugin’s login/authentication mechanism over the network, with no privileges or user interaction required. It carries a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: an authentication bypass using an alternate path or channel (CWE-288), allowing the plugin’s authentication controls to be circumvented.
  • Trigger conditions: the vulnerability is remotely exploitable without any prior authentication, privileges, or user interaction.
  • Attack vector: network (AV:N), low attack complexity (AC:L).
  • Impact: full compromise of confidentiality, integrity, and availability (C:H/I:H/A:H) on the affected WordPress site/application, consistent with unauthorized access to functionality or data normally gated behind login.

Affected software

  • EduAdmin Booking WordPress plugin, versions up to and including 5.4.2.
  • Fixed in version 6.0.0 and later.

Severity

  • CVSS v3.1 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

Mitigation and recommended actions

  • Immediate: Update the EduAdmin Booking plugin to version 6.0.0 or later, which the vendor states includes authentication fixes. Note the vendor has flagged that this update may break some existing "convenience" login flows in exchange for improved security.
  • If no patch can be applied immediately: restrict or disable public access to the EduAdmin Booking plugin’s login/booking functionality where feasible, monitor for anomalous unauthenticated access to plugin endpoints, and prioritize patching given the unauthenticated, network-exploitable nature of this flaw.

References

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