CVE-2026-19801
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.
- CVSS 3.1
- 4.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 34% of CVEs (scores of 2026-10-25)
- CWE
- CWE-862
- Published
- Modified
- Record from
- the NVD, synced
References
- https://plugins.trac.wordpress.org/browser/betterlinks/tags/3.0.0/betterlinks.php#L254
- 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/includes/Admin/Ajax.php#L99
- https://plugins.trac.wordpress.org/browser/betterlinks/tags/3.1.0/betterlinks.php#L254
- https://plugins.trac.wordpress.org/browser/betterlinks/tags/3.1.0/includes/Admin/Ajax.php#L180