CVE-2026-19801 Missing authorization in BetterLinks – Link Shortener, Link Cloaking, Redirects, Affiliate Link Manager & MCP
Authenticated subscribers can create arbitrary short URLs due to missing authorization checks, enabling phishing and SEO abuse in BetterLinks plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19801?
CVE-2026-19801 is a medium-severity missing authorization vulnerability in wpdevteam BetterLinks – Link Shortener, Link Cloaking, Redirects, Affiliate Link Manager & MCP, published on 25 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-19801?
How do I fix CVE-2026-19801?
No fix has been published for CVE-2026-19801 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-19801 being exploited?
There is no known exploitation of CVE-2026-19801 in the wild and no public exploit code.
Sources
Also known as GHSA-64w4-qrww-rxhv.