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
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.
INFO
Published Date :
Oct. 10, 2026, 5:16 a.m.
Last Modified :
Oct. 10, 2026, 5:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Download Manager plugin.
- Remove or disable the plugin if not actively used.
- Monitor for suspicious administrative account activity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-103964.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-103964 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-103964
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-103964 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-103964 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Oct. 10, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Added CWE CWE-200 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/103xxx/CVE-2026-103964.json">CVE-2026-103964</a> Added Reference https://plugins.trac.wordpress.org/browser/download-manager/ Added Reference https://plugins.trac.wordpress.org/browser/download-manager/tags/3.3.71/src/__/Email.php#L382 Added Reference https://plugins.trac.wordpress.org/browser/download-manager/tags/3.3.71/src/__/Email.php#L383 Added Reference https://plugins.trac.wordpress.org/browser/download-manager/tags/3.3.71/src/__/Email.php#L533 Added Reference https://plugins.trac.wordpress.org/browser/download-manager/tags/3.3.71/src/User/UserController.php#L151 Added Reference https://plugins.trac.wordpress.org/browser/download-manager/tags/3.3.71/src/User/UserController.php#L180 Added Reference https://plugins.trac.wordpress.org/changeset/3724472/download-manager/trunk/src/__/Email.php Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/84791a83-197b-4a73-826d-517bf47bc5c9?source=cve