CVE-2026-18937Broken Link Checker < 2.4.12 - Unauthenticated RCE via Query Variable Injection
Updated under an hour ago ()
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It affects Unknown Broken Link Checker. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.0 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-94
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- WPScan
- NVD analysis
- Deferred
- Record last updated
- Aug 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Unknown Broken Link Checker unknown:broken_link_checker (from the name) | before 2.4.12 | CNA record |
References
- https://wpscan.com/vulnerability/a23b76eb-107d-4e02-8eae-c3c5fa5b003d/exploit, vdb-entry, technical-description
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.