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CVE-2026-19801

4.3 · MEDIUM

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.

Published Aug 25, 2026CWE-862EPSS 0.29%

Overview

CVE-2026-19801 is a medium-severity vulnerability. It was published on August 25, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refplugins.trac.wordpress.org/browser/betterlinks/tags/3.0.0/betterlinks.php#L254Refplugins.trac.wordpress.org/browser/betterlinks/tags/3.0.0/includes/Admin/Ajax.php#L180Refplugins.trac.wordpress.org/browser/betterlinks/tags/3.0.0/includes/Admin/Ajax.php#L99Refplugins.trac.wordpress.org/browser/betterlinks/tags/3.1.0/betterlinks.php#L254Refplugins.trac.wordpress.org/browser/betterlinks/tags/3.1.0/includes/Admin/Ajax.php#L180Refplugins.trac.wordpress.org/browser/betterlinks/tags/3.1.0/includes/Admin/Ajax.php#L99Refplugins.trac.wordpress.org/changeset?reponame=&old=3658390%40betterlinks&new=3658390%40betterlinksRefwww.wordfence.com/threat-intel/vulnerabilities/id/faf44730-b975-4057-96dc-7284775500f9?source=cve

How CyberStrike helps

Frequently asked questions

What is CVE-2026-19801?

CVE-2026-19801 is a medium-severity vulnerability. It was published on August 25, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-19801?

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-19801?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-19801?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-19801 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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