CVE-2026-18937 Broken Link Checker < 2.4.12 - Unauthenticated RCE via Query Variable Injection

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 ...

CVE-2026-18937

The Broken Link Checker plugin before 2.4.12 accepts unrestricted query variables on sites using plain permalinks, letting unauthenticated users overwrite arbitrary PHP globals and achieve remote code execution when a classic editor is active. CVSS 9.0 (Critical). No exploitation evidence is prov...