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CVE-2026-18937

CRITICAL 9.0 CVSS 3.1
Published
August 19, 2026
Last modified
November 9, 2026
NVD status
Deferred
Reported by
contact@wpscan.com
Weakness
CWE-94
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Description

The Broken Link Checker WordPress plugin before 2.4.12 does not limit which query variables it accepts from user input on sites using plain permalinks, allowing unauthenticated users to overwrite arbitrary PHP global variables, and to execute arbitrary code on the server when a classic (non-block) is active.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Unknown Broken Link Checker — Before 2.4.12

References

  • wpscan.com https://wpscan.com/vulnerability/a23b76eb-107d-4e02-8eae-c3c5fa5b003d/
  • nvd.nist.gov Official NVD record