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.
References8
- plugins.trac.wordpress.org/browser/betterlinks/tags/3.0.0/bette…
- plugins.trac.wordpress.org/browser/betterlinks/tags/3.0.0/inclu…
- plugins.trac.wordpress.org/browser/betterlinks/tags/3.0.0/inclu…
- plugins.trac.wordpress.org/browser/betterlinks/tags/3.1.0/bette…
- plugins.trac.wordpress.org/browser/betterlinks/tags/3.1.0/inclu…
- plugins.trac.wordpress.org/browser/betterlinks/tags/3.1.0/inclu…
- plugins.trac.wordpress.org/changeset?reponame=&old=3658390%40be…
- www.wordfence.com/threat-intel/vulnerabilities/id/faf44730-b975…
Metrics
- CVSS 3.1
-
4.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - EPSS — exploit probability
- 0% percentile: 35 · as of 9 November 2026
- CWE
- CWE-862
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