CVE-2026-103964

Download Manager <= 3.3.71 - Authenticated (Subscriber+) Sensitive Information Exposure via Email Template Token Injection in 'first_name' Profile Field Token Injection into Suspension Email

2026-10-09 15:29
Sawyer

Strategic Overview

Status
Patched in 3.3.72
Affected Plugin
Download Manager
Affected Version
<= 3.3.71
CVSS
4.3Medium
Weakness type
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
CVE
CVE-2026-103964
View all Download Manager vulnerabilities

At a glance

CVE-2026-103964 is a medium-severity Exposure of Sensitive Information to an Unauthorized Actor vulnerability in the Download Manager WordPress plugin, affecting versions <= 3.3.71. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 3.3.72; sites on affected versions should update now. Disclosed October 2026, reported by Sawyer.

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Download Manager <= 3.3.71 carries this weakness at first_name, and reaching it takes an account at Subscriber level or above. Sensitive information exposure means data the application intended to keep internal is returned to a caller who should not be able to see it.

The disclosed data — credentials, tokens, customer records or internal paths — is usually worth more as material for a follow-up attack than as an end in itself. For Download Manager the fix is 3.3.72: builds <= 3.3.71 are affected, anything from 3.3.72 onward is not.

Remediation

Update to version 3.3.72, or a newer patched version

How does WordSec protect against this?

The fix is the thing that ends this: Download Manager 3.3.72 closes this, and updating the plugin is the step that ends it.

  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-103964https://www.wordfence.com/threat-intel/vulnerabilities/id/84791a83-197b-4a73-826d-517bf47bc5c9https://nvd.nist.gov/vuln/detail/CVE-2026-103964

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C