Detections
Analytics
CVE-2026-19801
medium
Description
The BetterLinks – Link Shortener, Link Cloaking, Redirects, Affiliate Link Manager & MCP plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.1.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to create arbitrary BetterLinks short URLs with attacker-controlled slugs and redirect destinations, enabling phishing and SEO abuse. Exploitation requires the Fluent Boards companion plugin to be installed and active (so that the FLUENT_BOARDS constant is defined), and is further facilitated by the betterlinks_admin_nonce nonce being emitted on every frontend page via wp_localize_script, making it accessible to any authenticated user.
References
https://plugins.trac.wordpress.org/browser/betterlinks/tags/3.1.0/includes/Admin/Ajax.php#L99
https://plugins.trac.wordpress.org/browser/betterlinks/tags/3.1.0/includes/Admin/Ajax.php#L180
https://plugins.trac.wordpress.org/browser/betterlinks/tags/3.1.0/betterlinks.php#L254
https://plugins.trac.wordpress.org/browser/betterlinks/tags/3.0.0/includes/Admin/Ajax.php#L99
https://plugins.trac.wordpress.org/browser/betterlinks/tags/3.0.0/includes/Admin/Ajax.php#L180
https://plugins.trac.wordpress.org/browser/betterlinks/tags/3.0.0/betterlinks.php#L254