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CVE-2026-3649

5.3 · MEDIUM

The Katalogportal PDF Sync plugin for WordPress is vulnerable to Missing Authorization in all versions up to and including 1.0.0.

Published Apr 15, 2026CWE-862EPSS 0.40%

Overview

CVE-2026-3649 is a medium-severity vulnerability. It was published on April 15, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The Katalogportal PDF Sync plugin for WordPress is vulnerable to Missing Authorization in all versions up to and including 1.0.0. The katalogportal_popup_shortcode() function is registered as an AJAX handler via wp_ajax_katalogportal_shortcodePrinter but lacks any capability check (current_user_can()) or nonce verification. This allows any authenticated user, including Subscribers, to call the endpoint and retrieve a list of all synchronized PDF attachments (including those attached to private or draft posts) along with their titles, actual filenames, and the katalogportal_userid configuration value. The WP_Query uses post_status => 'any' which returns attachments regardless of the parent post's visibility status.

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/katalogportal-pdf-sync/tags/1.0.0/inc/class.admin.php#L12Refplugins.trac.wordpress.org/browser/katalogportal-pdf-sync/tags/1.0.0/inc/class.admin.php#L209Refplugins.trac.wordpress.org/browser/katalogportal-pdf-sync/trunk/inc/class.admin.php#L12Refplugins.trac.wordpress.org/browser/katalogportal-pdf-sync/trunk/inc/class.admin.php#L209Refwww.wordfence.com/threat-intel/vulnerabilities/id/a01e7b21-f3ff-42a8-b78a-ad69973eda01?source=cve

How CyberStrike helps

Frequently asked questions

What is CVE-2026-3649?

CVE-2026-3649 is a medium-severity vulnerability. It was published on April 15, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-3649?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-3649?

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-2026-3649?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-3649 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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