CVE-2026-18937CWE-94code-injection

CVE-2026-18937

Critical · published August 19, 2026

CVSS v3.1
9.0
EPSS
2%
Percentile
80.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01993 · 80.5th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2026-08-19T10:17Z
References (1)
https://wpscan.com/vulnerability/a23b76eb-107d-4e02-8eae-c3c5fa5b003d/ · [email protected]
EPSS history
Timeline
  • 19 AUG 06:00Z
    Broken Link Checker < 2.4.12 - Unauthenticated RCE via Query Variable Injection
    cvelistv5