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CVE-2026-103964

4.3 · MEDIUM

The Download Manager plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.3.71 via the 'first_name' parameter.

Published Oct 10, 2026CWE-200EPSS 0.24%

Overview

CVE-2026-103964 is a medium-severity vulnerability. It was published on October 10, 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 Download Manager plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.3.71 via the 'first_name' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to extract the administrator's full Cookie header, including wordpress_logged_in_* session cookies, from the suspension email sent during the administrator's authenticated request, enabling full session hijack and account takeover. Exploitation requires an administrator to perform the Suspend action against the attacker's account, which causes the plugin to synchronously compile and send the suspension email inside the administrator's authenticated HTTP request — making the administrator's session cookies available to the template engine at send time.

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/download-manager/Refplugins.trac.wordpress.org/browser/download-manager/tags/3.3.71/src/User/UserController.php#L151Refplugins.trac.wordpress.org/browser/download-manager/tags/3.3.71/src/User/UserController.php#L180Refplugins.trac.wordpress.org/browser/download-manager/tags/3.3.71/src/__/Email.php#L382Refplugins.trac.wordpress.org/browser/download-manager/tags/3.3.71/src/__/Email.php#L383Refplugins.trac.wordpress.org/browser/download-manager/tags/3.3.71/src/__/Email.php#L533Refplugins.trac.wordpress.org/changeset/3724472/download-manager/trunk/src/__/Email.phpRefwww.wordfence.com/threat-intel/vulnerabilities/id/84791a83-197b-4a73-826d-517bf47bc5c9?source=cve

How CyberStrike helps

Frequently asked questions

What is CVE-2026-103964?

CVE-2026-103964 is a medium-severity vulnerability. It was published on October 10, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-103964?

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-2026-103964?

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-2026-103964?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-103964 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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