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CVE-2026-103752 – Unauthenticated Privilege Escalation – Authorizer WordPress Plugin ≤ 3.15.3

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Summary

CVE-2026-103752 is an unauthenticated privilege escalation vulnerability in the Authorizer WordPress plugin, affecting all versions up to and including 3.15.3. The flaw allows a remote, unauthenticated attacker to escalate privileges on the affected WordPress site without any credentials or user interaction. It carries a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: incorrect privilege assignment (CWE-266) within the Authorizer plugin’s authentication/authorization handling.
  • Trigger conditions: no authentication or user interaction is required; the vulnerable logic can be reached directly over the network.
  • Attack vector: network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N).
  • Impact: successful exploitation grants an unauthenticated attacker elevated privileges, with high impact to confidentiality, integrity, and availability of the WordPress site (potential full site takeover, e.g., administrator-level access).

Affected software

  • Authorizer (WordPress plugin) — all versions up to and including 3.15.3

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: upgrade the Authorizer plugin to version 3.16.0 or later, which remediates the privilege escalation issue.
  • If immediate patching is not possible: disable or remove the Authorizer plugin until it can be updated, restrict administrative access to the WordPress admin area via network-level controls (e.g., IP allowlisting, WAF rules), and monitor for unexpected creation or modification of privileged user accounts.

References

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