CVE-2026-96562
MediumCVSS 6.5Summary
The Broken Link Checker plugin for WordPress in versions up to and including 2.4.14.1 is vulnerable to arbitrary shortcode execution because it does not properly validate a value before running do_shortcode. Unauthenticated attackers can execute arbitrary shortcodes if a submitted comment containing the payload in an href or src attribute is approved through the normal comment moderation workflow; once approved, the shortcode executes automatically via WP-Cron.
Risk Assessment
Arbitrary shortcodes can be executed in the site context, potentially leading to data disclosure or content modification.
Recommendation
Update the Broken Link Checker plugin to a version later than 2.4.14.1. Consider tightening comment moderation.
Other vulnerabilities in Broken Link Checker
See all- CVE-2026-102389Medium
Improper Control of Generation of Code ('Code Injection') vulnerability in WPMU DEV Broken Link Checker broken-link-checker allows Code Injection.This issue affects Broken Link Checker: from n/a through 2.4.14.1.
- CVE-2026-84772Medium
Editor Server Side Request Forgery (SSRF) in Broken Link Checker <= 2.4.14 versions.
- CVE-2026-75528High
The Broken Link Checker plugin for WordPress up to version 2.4.13 is vulnerable to Stored Cross-Site Scripting via Comment Author URL / Link Log due to insufficient input sanitization and output escaping. Unauthenticated attackers can inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires an administrator to perform the plugin's standard dismiss-and-recheck workflow on a link submitted by the attacker via the WordPress comment author URL field, after which the attacker's HTTP server issues a redirect to a URL containing an HTML/JavaScript payload that is stored verbatim in the link log.
- CVE-2026-39466High
The Broken Link Checker plugin by WPMU DEV up to version 2.4.7 inclusive is vulnerable to Blind SQL Injection due to improper neutralization of special elements used in an SQL command.
Original NVD description (English source)
The The Broken Link Checker plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 2.4.14.1. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes. Exploitation requires that a submitted comment containing the shortcode payload in an href or src attribute is approved through the site's normal comment moderation workflow; once approved, the shortcode is executed automatically via WP-Cron without any further attacker interaction.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS