CVE-2026-18937
Broken Link Checker < 2.4.12 - Unauthenticated RCE via Query Variable Injection
- State
- Published
- Severity
- 9.0 Critical
- Published
- Aug 19, 2026
- Updated
- Aug 19, 2026
- Reserved
- Aug 5, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.0 Critical | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-94 Improper Control of Generation of Code ('Code Injection')
Affected Products
| Product | Versions |
|---|---|
Broken Link CheckerUnknown |
|
References
- https://wpscan.com/vulnerability/a23b76eb-107d-4e02-8eae-c3c5fa5b003d/exploitvdb-entrytechnical-description
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