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Critical · 9.0 Scanner template Public exploit CVE-2026-18937 EUVD-2026-62285GHSA-c2xc-88v3-37g2

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

Published Aug 19, 2026 · Updated Aug 19, 2026 · Assigned by WPScan

Category: Web / CMS

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.

Affected products

VendorProductAffectedFixed
— Broken Link Checker < 2.4.12 2.4.12

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • abraxas/CVE-2026-18937 ★ 0 · Sep 19, 2026

    CVE-2026-18937 - Broken Link Checker - Critical 9.0 - Unauthenticated GET /?page_id=4&shortcode_tags[blcpoc]=po... - Remote Code Execution

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

References