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New CVE Detected

CVE-2026-18052 – Authentication Bypass – ManageWP Worker WordPress Plugin (before 4.9.37)

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Summary

CVE-2026-18052 is an improper authentication vulnerability (CWE-287) in the ManageWP Worker WordPress plugin. The signature used to authorize login links is not bound to a specific user account, and the plugin does not prevent replay of previously used login links, allowing an attacker who obtains such a link to impersonate any site user, including administrators. The flaw carries a CVSS v3.1 base score of 8.1 (High).

Technical details

  • Root cause: The login-authorizing signature generated by the Worker plugin is not tied to a specific user account, and used login links are not invalidated after use.
  • Trigger conditions: An attacker needs access to a previously issued (or intercepted) login link/signature for the target site.
  • Attack vector: Network — the attacker replays the captured login link against the site to authenticate.
  • Impact: Full authentication bypass allowing impersonation of any user, including administrators, resulting in complete loss of confidentiality, integrity, and availability of the affected site.

Affected software

  • ManageWP Worker WordPress plugin: all versions prior to 4.9.37

Severity

  • CVSS v3.1 Base Score: 8.1 (High)
  • Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Update the ManageWP Worker plugin to version 4.9.37 or later, which binds login signatures to specific user accounts and prevents replay of used login links.
  • If patching is not immediately possible: Restrict or rotate any distributed ManageWP login/connection links, monitor admin login activity for anomalies, and consider temporarily disabling the Worker plugin’s remote login functionality until patched.

How IONIX identifies potentially affected assets

IONIX matches the following signal against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Raw response body: /wp-content/plugins/worker/

References

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1

Map your entire attack surface (continously)

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