{"id":"CVE-2026-18937","aliases":["EUVD-2026-62285","GHSA-c2xc-88v3-37g2"],"status":"published","title":"Broken Link Checker \u003c 2.4.12 - Unauthenticated RCE via Query Variable Injection","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.","severity":{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.01993,"percentile":0.80856,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-94"],"published":"2026-08-19T06:00:20Z","modified":"2026-11-09T20:10:00Z","exploits":[{"source":"pocgithub","id":"abraxas/CVE-2026-18937","title":"abraxas/CVE-2026-18937","date":"2026-09-19","url":"https://github.com/abraxas/CVE-2026-18937"},{"source":"nuclei","id":"CVE-2026-18937","title":"WordPress Broken Link Checker \u003c 2.4.12 - Remote Code Execution","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-18937.yaml"}],"products":[{"vendor":"unknown","product":"broken link checker"},{"vendor":"wpmu dev - your all-in-one wordpress platform","product":"broken link checker"}],"references":[{"url":"https://wpscan.com/vulnerability/a23b76eb-107d-4e02-8eae-c3c5fa5b003d/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18937"},{"url":"https://wpscan.com/vulnerability/a23b76eb-107d-4e02-8eae-c3c5fa5b003d"},{"url":"https://github.com/advisories/GHSA-c2xc-88v3-37g2"}],"sources":{"cve":[{"id":"CVE-2026-18937","title":"Broken Link Checker \u003c 2.4.12 - Unauthenticated RCE via Query Variable Injection","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.","status":"published","published":"2026-08-19T06:00:20.316Z","modified":"2026-08-19T16:23:42.509Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:20:12.60856Z"}],"euvd":[{"id":"EUVD-2026-62285","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.","status":"published","published":"2026-08-19T06:00:20Z","modified":"2026-08-19T16:23:42Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:01:44.550802Z"}],"ghsa":[{"id":"GHSA-c2xc-88v3-37g2","title":"The Broken Link Checker WordPress plugin before 2.4.12 does not limit which query variables it...","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.","status":"published","published":"2026-08-19T06:31:18Z","modified":"2026-08-19T18:33:51Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:10:44.12734Z"}],"nvd":[{"id":"CVE-2026-18937","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.","status":"published","published":"2026-08-19T06:17:38.847Z","modified":"2026-11-09T20:10:00.2Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-94"],"updated_at":"2026-11-09T22:15:51.558963Z"}]}}